Yikes. Don't panic. She'll even out, but she needs your help. I found with my twins that making sure they have a set nap schedule during the day helps to regulate how they sleep at night. By seven months I tried having them on a two nap schedule: roughly between 8:30 & 9:00 in the morning to go down for a nap and then between 1 & 1:30 to go for a nap in the afternoon. The morning nap averages 45 minutes to 1 hour now and the afternoon between 1 1/2 hours to 2 hours. Having that schedule in the day really helped them to sleep better at night. I also have a routine both for nap and for night time. At nap time, we always start to wind down in their room. I let them play, we read books, etc., and then I put them in sleep sack, turn on their sound machine, and leave the room. It is always dark when I leave them. When we first started, they definitely put up a fight, but I did let them cry. Ultimately, if they are tired, they sleep, but I also know that getting longer naps is developmental, too.
At night, they eat dinner, play for maybe 30 minutes, take a bath, have quiet time in their room, and then sleep sacks, sound machine, and bed. The bath for us was key. They have a bath every night, and it sort of tells them that this is bed time and that means longer sleep.
Obviously it was not this easy to start, and you have to try different methods, but try to establish a routine that is predictable for your child. It really helps. Also, we have learned to know when the boys need to eat and when they're just waking and need to get themselves back to sleep. My guys are almost 11 months old, and I still feed them once a night, but they have learned to get back to sleep at other times, and they are in bed usually by 7 and sleep until about 6:30 the next morning.
I hope that helps. Remember that every child is different, and what worked for us may not work for you, but remember that you do have to teach your child to sleep. She needs you to help her with that. Good luck.