to still be affected by workplace bullying 5 years later

[user9099909]

Five years ago I returned to my job after cancer treatment, I was subjected to bullying by some of my colleagues, I never reported it as I wasn't sure if I was over sensitive due to a tough six months before. They really knocked my confidence and it took me a long time to regain it.
I have returned this week to work after 6 weeks off with illness (not cancer related) and its making me very anxious remembering what i went through.
AIBU to feel like this?

Sorry to hear it’s currently happening to you. Sending strength. Do you have access to a mental health first aider? Through work or elsewhere? It really helped me. I never officially reported my bullies as I didn’t have the courage, and one of them actually told me in my appraisal “If anyone ever stops me doing my job or looks to tarnish my reputation, they would not know what hit them, do you understand?”

I realised someone we knew was a MHFA and I approached her when I was last in the office one day and they never knew I was seeing her. Aside from leaving, it was the best thing I did.