Bek,
I went through the same situation as you. My ex and I separated while I was 3 months pregnant and only 6 months of married life. He also made a lot of empty promises. But in my situation, it was easier for me to leave because he was also threatening. Needless to say, I went through the pregnancy and birth without him.
Everyone's situation is different, and you should really think about yours and your baby now. It may be anxiety on everyone's part... But, if it ever gets to the point where the situation is harmful for you or your baby...get out!
You and your husband may be seeing different sides of the promises. But at this point, I really think you should give marriage counseling a try. If that doesn't work, go to your county court facilitator for legal advice,... it's usually free. Lastly, if your husband hires an attorney, then you should hire an attorney, an experienced family law attorney. Make sure you check the attorney's track record. Ask around your area or you may even want to sit in court to listen to several of his/ her cases. It won't be cheap, so you should do your homework and make sure your money is well spent...to level the playing field.
Also, protect your child by not exposing him to the ugliness of a divorce. Control what you say and do about your ex. Your child is a baby now, but he will soon know and question everything. My 2 year old is going through his questioning/ exploration stage. Thankfully, he only questions me about Elmo, Big Bird, and Barney :)
I have no regrets about my decision... but I think my ex does. I have primary custody, and my ex has visitations. I also have court-ordered child support now. Fortunately, I have help from a respected divorce attorney.
Hope this helps...Take care.