Paranoia after leaving toxic relationship

So I was in an emotionally abusive relationship of 2.5 years that ended in November. I dealt with a lot of emotional manipulation and control. He was gaslighting me for a very long time. He was emotionally cheating on me, and then lying and deceiving me the entire time. After the relationship ended I learned he had cheated on me with one of those girls. He was financially controlling and I had to finance the entire relationship myself. There were elements of sex that weren’t right but I don’t feel comfortable describing them as abusive. I have mental health issues and he completely dismissed my feelings completely and it all really took a toll on me

He ended up ending the relationship in November. He blocked me on everything and I haven’t heard from him since. I’ve moved on, I’m in a new relationship and I am so much happier now

The problem is I feel so paranoid. He blocked me on everything on social media, but I know if he unblocked me temporarily then he could still see my posts. So I went on private on all my accounts, removed all his friends etc on Instagram, Twitter, snapchat. I went back recently and I’ve blocked every account of his that I know, blocked all his friends so they can’t access my accounts and I can come off private. Personal preference, I just prefer being public

I’m so paranoid he’s going to find stuff out about me. I don’t want him knowing what I look like, that I’m in a relationship, who I’m in a relationship with. I ended up dropping out of university last year and I’ve just accepted a place at one of the top universities in the UK to continue my studies. I don’t want him knowing anything about that either

A few months back i realised he had a second twitter account that he’d hid from me and he had liked one of my posts and quickly blocked me. A few days ago I found a second Instagram account hed had a couple years back that was following me

I feel so vulnerable and paranoid that he’s going to get to me. Even though he was never physical with me I’m just so scared and paranoid. Is this normal?? How can I stop feeling like this 😔