please help

hello

My problem is that I cant forget problems that happen to me
even a small problems i keep remembering them over and over
and thinking all the day and night even problems happened
years ago i am very depressed because of the bad memories
keep thinking of revenge
I don't know if this is called "rumination" or PTSD
maybe i am hypersensitive but i can't take this feelings anymore
and i want to eliminate this problem

I am also diagnosed with schizoid personality disorder

thank you

well , i never encountered a real big trauma
it is small bad events but i keep living it over and over for more than year,
and it feel like real hell