Im here to vent

Me and husband have been together 3 years. First year was rough because we were on & off because he was immature and texting girls and for all i know having sex with them. Well we went through alot and now were married with a babygirl who is one month old and ss is 8. So when we got back together dec 2017 i blocked all those girls and he knew. Now since we got married he unblocks a girl and messages her and i go block her and confront him right away and he asks why i look thru his phone and flips it and yells at me. I look through it because of this. What gets me mad is this chick looks older then him with 2 kids and she pisses me off she knows about me and even was trying to add me on social media yes i know its HIS fault. Now with my babygirl qhen we argue he yells really loud infront of her and that upsets me because shes a baby and i dont wanna scare her. I have no family im a SAHM. No money or friends so even if he did cheat i would have no where to go.. I do love him idk what to do.