Found texts to another girl

I just found texts to another girl on my boyfriends phone. We had a fight and I moved out a few weeks ago however We have been trying to work things out or so i thought. We had a fight on 4th of July and I moved out however he was asking this girl on June 28 to spend 4th of July with him. I came over today to try to get back on track and now i don't know what to do. Should I get the rest of my stuff and leave permently even though he never met up with the girl. I'm 20 weeks pregnant and now feel totally overwhelmed and lost