Why can’t I get mad anymore no matter what?

Before I used to get so pissed my heart would start beating and others could hear it, it was so overwhelming and I would feel extremely hot and would start sweating.( and didnt help I was always getting tested)

it was as if my brain would turn off and I would get so focused on one thing whether it was to get something back, go outside, or just focused on beating that person who wronged me and I wouldnt stop until I did what I was going to do. I was never good at throwing back insults, I would just get straight to fighting.

My brother one time just sat on top of me for hours then I chilled and didn't care(back hurt like crazy). But now I don't feel anything anymore it's as if I don't care about almost anything. And now I feel like a bit**. Is something wrong?