Whats emotionally wrong with me?

Okay so when I was about 3 or 4 I was abused by my now ex stepmother I haven't seen the woman in 18 years and I have really pushed away all the bad memories and today, I work at a children's birthday place, she came in for her grandsons birthday. I never would have recognized her if I hadn't remembered that her daughter the child's mothers name and that she was deaf. Upon my realization I started to have a horrible panic attack and broke downward balled for about an hour in the breske room eventually getting sent home. All the memories came rushing back now I can't stop thinking about it. What's wrong with me?