PTSD-anger issues

I have this explosive anger issue where I get numb and blank as if my brain short circuits and i have no control of myself I just become this beast .I once had a fight which wasn't even required i love my brothers yet one day I just pulled out a hammer and started banging his door he didn't even know I would react like that . Then few months ago out of fit of anger i had pulled out knife on my older brother.
Worst was when my mother and i were arguing about something and i just pulled up a screwdriver and hitted it on the table 9-10 times in anger .I told my doctor about this they gave me medications but ever since withdrawal symptoms I refused to take them and tapered them to complete pause ..but now i am facing the issue of anger burst out again with sudden zapps on my right side and it makes me feel dizzy .I feel very lost and vulnerable after a fight,i feel like I might faint if I continue fighting. I was never like this i won fights and now I can't even bear raising voice. I can't even remember why I was fighting .if I try to recall the fight then my head starts spinning .I really don't know what to do I am so tired of this. I need some tricks or technique of there is any to stop getting angry like that .