Is this group of people working together to stalk me? I’m scared

I dated my abuser for 5 years and he had a crazy ex. (She really was crazy, faked a pregnancy and made up a bunch of crazy stories for attention, just turns out that he secretly was crazy too). I’m almost 100% he had her be friends with me after the split to keep tabs. I don’t remember who added who, but a guy on Facebook that was friends with her started messaging me. saying that he thought I looked familiar. We started talking from there and it was.. sketchy. We talked on the phone but he very rarely sent pics/videos of himself, would never meet up, never video chat, etc. Which sounds like a catfish, except his Facebook seems legit and his Facebook is very clearly linked to all his other social medias. I figured he was just leading me on but then too I noticed that my abuser all of a sudden knew about a restraining order that was coming before it was even served and this guy was the only one who knew outside of immediate family. I called him out and he said I told him myself. I blocked him right away. Then I had another relationship months ago and he turned out shitty too. I know it sounds stupid, but I wanted to see if he would say that he was linked to my ex so I unblocked him. We started talking.a little and today, he drops that he knew I was in relationship. Which was weird because I blocked him, so how would he be looking? And why? It also was weird to me because the crazy girl I talked about at first also tried asking me questions about my relationship when I was still with him. And my abuser was making fake accounts to try to talk to me around that time too.