My 14/15-ish daughter put me through hell.
There were times I was certain someone body snatched her because she just flipped on a dime. She was disrespectful to me, mean to her little brother. She didn't have a cell phone. I surprised her with one and she said she didn't want it because it wasn't the exact same kind her friends had.
I returned it, got my money back. and she didn't get a cell phone until after she moved out and could pay for one herself.
Anyway, as a single mom, she was pretty hard on me. She didn't want to talk about school, she didn't want to talk about her friends. She threw an absolute fit when it was her turn to load or unload the dishwasher let alone keep her own bathroom clean. She saw me as an ogre and a tyrant. I worked full time and supported two kids by myself and she just felt I never did enough for her. She would call me at work (I worked across the street from the school) and she would say she'd be there in 5 minutes to get money she needed for a science project. She knew I never carried cash and she knew that I went to lunch at 1:30pm. She'd say, "If you can't give me the money NOW, just forget it! Because of YOU, I'm going to get an F on my project". I talked to her teacher and that project had been assigned 3 weeks earlier. That was the first I'd heard of it. Basically, the day it was due.
I didn't run to her rescue. I couldn't ask for time off to get her all she needed when she'd known all along and never said anything.
I had to do the tough love thing with her. Totally. There was a silver lining.
Her little brother knew better than to follow in her footsteps because he knew what he'd have coming. My son has been the easiest kid to raise. He's never been in trouble, he's on track to graduate early, he's already served several years in law enforcement junior academies. He's the straightest and best kid you could ever meet.
My daughter is now 26 and has a child of her own. She doesn't smoke or drink, she's very into organic and has a great work ethic. She's a wonderful mother. She has apologized to me so many times for the way she acted when she was younger. Looking back, she's ashamed of her behavior.
There is hope for her. Sometimes teenagers get peeved when you question them about their friends or what's going on at school. She may want to be left alone, and sometimes that's fine, but you two still have to have some communication.
I wouldn't tell her that you snooped. She will feel like you invaded her privacy (which you have every right to do when she's only 14). She will take hold of that issue and hang on to it as opposed to talking with you.
Take her to get a hot fudge sundae, just the two of you. Don't grill her for answers, just let her know that you feel you're drifting apart and as a mom, you don't know how to communicate with her anymore. LISTEN to what she says. You understand she's growing up, you understand she's going through changes, you just don't want to be shut out. You're her mother, you love her, you don't know how to take the distance she's putting between you and the rest of the family.
See what she says.
My daughter was mean as a hornet, but she's not anymore. She's very sweet, she asks my advice, she thinks I'm a human encyclopedia (which I kinda am). She has grown up and appreciates NOW all the things I did to raise her even when, at the time, she thought I was being harsh or unfair.
You can get this turned around. Try listening more than talking at first.
If she tells you she's being pressured to do drugs, don't freak out.
My son is involved in law enforcement. He knows lots of kids who drink or smoke pot. Or worse. He goes to school with kids who've been busted.
Just because he knows them it doesn't mean he does any of that.
He's on track for a career in law enforcement and he doesn't partake or do anything that could get him in trouble.
You're not a bad mother.
This is a phase.
See if there are mentor programs through her school.
See if there are law enforcement programs in your local area.
You'd be surprised how many girls are involved in the law enforcement programs. They get to go on ride alongs, they get to go on DUI checkpoints, they get to be there when people are arrested for theft at stores.
Get her involved in something positive even if it's volunteering at local nursing homes or the hospitals.
I think if you can get her involved in focusing on others, it might be really good for her. See if her school has an ROP program. Regional Occupational Program. They learn job skills and can actually get credit for working while going to school.
I would try getting her focused in a different direction. She may feel better about herself, consider the friends she's hanging out with, and get on a good path for herself.
My daughter turned around but it wasn't easy getting her there.
She now works and dedicates herself to being a caregiver for people who are mentally ill, bipolar, etc. She has a big and loving heart....she just had to find it.
Best wishes to you!