What do I do if my fiance is saving his ex girlfriend under a guy's name and is friends with her on social mediaand she stays with his mom?

Ok so this guy well boy in my eyes now lied about using this ex car when he went to his mom's, he lied about when he broke up with her and he received money on cash app from her. To top things off while I was pregnant with his baby she was calling him and it would say uncle Rob but it was her. All this and he twists it on me I'm over reacting he's not cheating and I'm paranoid. But I know if the roles were switched he'd be furious. I can't go to the gym unless he's with me, I can't go to the store real quick unless he's with me, I can wear certain things, and he made me delete my Facebook when we got together but he has snapchat, Instagram, and Facebook shh I feel so dumbing played. He made me quit my teaching so he can truck drive and now he's like I pay for this and this and like it feels like he wants me to struggle I don't know please people I need advice

What do I do if my fiance is saving his ex girlfriend under a guy's name and is friends with her on social mediaand she stays with his mom?
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