So, I used to be addicted to sexting. I spent last 4 years (whole high school, graduated with average grades) doing it in most of my free time (most of it was searching for girls to do it with). I feel really bad about it, but I can't change past. Now sometimes when I do it I have this weird feeling, like something is wrong and then my upper body shakes a little (maybe it's tingling, idk. It's hard to describe). During that I also feel like I'm gonna die.  
I feel really scared and I'm afraid that I might have beggining of some psychosis/schizophrenia.   
I feel weird and scared like 50% of time.   
It started after bad LSD trip (6 months ago) in which I realised how shitty my life is.  
I feel kinda dissociated too.  
Any help?