Need to vent and advice

I ended up having a chemical pregnancy and it hurt both myself and my now ex pretty badly though he didn’t want any children and I wanted one, that was few weeks ago. Since then we’ve been constantly arguing, he’s threatened to leave me multiple times and just acts like he does not care at all about me. He has been on depression and anxiety medicine for years due to his past so I was use to everything and how he acted and tried to give him space and when I did that it ended up backfiring on me cause he decided to create a fake Facebook account and message my mom about my chemical pregnancy, if I had told her, and why I wasn’t answering which at the time all this happened I was at work. I work in a medical office and we can’t be on our phones all the time. I came back to, 30 something calls and texts, and the last one being he talked to my mom and I’m a liar, I was stunned cause I had no idea what was going on until my mom called me and we talked. Now I hadn’t told my mom about it cause I wanted time to grieve and she had enough going on with her own health issues but I ended up breaking down and telling her. Now take into consideration, this ex of mine has showed up to my job twice and my home whenever I was just so tired of everything I couldn’t argue with him anymore because I was always taking the blame for EVERYTHING because he thought I was done. This time after how he acted, I did say “do not contact me anymore. What you did was unacceptable, I was busy at work.” And after that he blocked me on all social media and even phone calls and texts.

I felt bad later and ended up emailing him that Friday morning that if he wanted to talked and move on from one another on a better note I would like too but the decision was his and I never heard anything. By Saturday/Sunday he had completely deactivated Facebook and Sunday morning I dropped his things off at his apartment, I just left them outside and texted him off my friends phone letting him know they were there. Monday morning; he brought Facebook back and decided to unblock me, but we aren’t friends on there so the only thing he sees is my profile picture which I had changed it yesterday (Tuesday) about a hour after I changed mine, he changed his and kept turning his active status on messenger off and on whenever I was on. I did see it, and he’s done it a good bit this morning.

now it’s been 48 hours and I’m blocked again

I don’t understand the behavior, I care about him and it worries me because during our relationship when he would break up with me he would block me but quickly unblock me, he also would tell me things such as he’s better off not here anymore, etc. it honestly scared me. And now, I haven’t actually spoke with him in a week but I’m confused and hurt by the situation. I don’t know what his actions are trying to show me. Especially to block and unblock and block again, change his profile picture right after I did mine. I know he’s doing it on purpose but I don’t know why and it’s bugging me.