Does anyone ever feel as if they will never truly be able to get over past trauma?

I am in a happy relationship with a HVM but sometimes I get really bad anxiety and overthink that everyone is out to get me and that I will get taken advantage of again. It comes in waves, I get these overwhelming feelings during the months of when I went through the trauma in the past even if it was 3/4 years ago during the month of November for example.

The moment I begin to feel like I have started to heal, my emotions get the best of me and I begin to overthink and make up unrealistic scenarios in my head of everything and anything that can go wrong even though everything is perfectly fine on the outside. Is there something wrong with me?

I get worried about pushing people away because of how depressed I get to the point of not wanting to open up or talk. I have tried therapy and everything else but nothing really seems to be helping.

Please share any tips on what helped you overcome the overwhelming feeling of anxiety in a healthy relationship after dealing with trauma in a past relationship.