It is totally understandable and normal to be feeling like this. Bullying can leave long-lasting impacts and can really affect how we feel even years later. There are things that can help though. I think counselling would be a good option - have a look at this link - it gives lots of advice about bullying but also info about counselling.
And this article may help:
You don't have to live in fear forever, it sounds like you have done an amazing job at trying to recover and succeeding in everything you do. I think you just need some support in working through what happened and letting go of the fear.
... and the ones that won't