cheated on

this morning I found out that my husband has been cheating on me (sexting other girls and planning on meeting up with them) when I confronted him he claims he never met up with any of them. he also learned a new song for me on the guitar for my birthday and he sent it to one of these girls and told her he learned it for her. all of this has been going on for over a year but I just found out today. 4 weeks ago I gave birth to our daughter. I'm so mad and hurt. I am most hurt that he would do this to our sweet baby. she deserves so much better. he says he's sorry and that he has been trying to get help from a pshyciatrist. he has been planning on meeting these girls when he goes out of town on business once a month. so I am now going to go with him so he doesn't do anything like this again he says he wants to fix it and that he still loves me. I don't trust anything he says right now, but should I try and make it work for our child's sake and hope that he pulls his head out of his ass?