Last few months I've been contemplating smoking cannabis again after a long 10 year break, I have been wanting it so bad that I started having dreams where I was high again, so today I finally scored some...yay!!! 
However there is a problem
I quit cannabis in the first place 10 years ago when I overdosed on ectsacy and amphetamines which left me disabled with a neurological condition and a damaged autonomic, soon after this condition I I found that my body was no longer tolerating any of the drugs that act on the Autonomic System such as opiates, sedatives, cannabis, alcohol, anelgesics and stimulants....
So with great caution I threw a spec of cannabis (about the size of a peppercorn) into a home made vaporiser about 1 hour ago, I let it steam up and took my first toke and then bang!!!!...I got an intense hot flushed feeling in my face, an instant rise of heat and my cheeks just went red and my heart began to pound liek crazy. I just ran an turned on the air cooling sytem and got a wet towel and lay in front of it trying to cool down, my temperature is at 37.8 c at the moment, not too bad but it could be considered a fever, my heart symtoms have settled down however I didnt get high, I just become unwell, I dont think I even managed to have enough to get high before the side effects kicked in... so now Im thinking of trying round two, but I thought I'd ask you guys first.....
After a 10 year break should I try and desensitise my body to cannabis before I can actually get high and enjoy it ? and for now should I call it a day and try the same amount again tommorrow until my body gets a little more used to it ? Or should I get back in there and jump straight back on the horse and see what happens in round two ?

However there is a problem

So with great caution I threw a spec of cannabis (about the size of a peppercorn) into a home made vaporiser about 1 hour ago, I let it steam up and took my first toke and then bang!!!!...I got an intense hot flushed feeling in my face, an instant rise of heat and my cheeks just went red and my heart began to pound liek crazy. I just ran an turned on the air cooling sytem and got a wet towel and lay in front of it trying to cool down, my temperature is at 37.8 c at the moment, not too bad but it could be considered a fever, my heart symtoms have settled down however I didnt get high, I just become unwell, I dont think I even managed to have enough to get high before the side effects kicked in... so now Im thinking of trying round two, but I thought I'd ask you guys first.....
After a 10 year break should I try and desensitise my body to cannabis before I can actually get high and enjoy it ? and for now should I call it a day and try the same amount again tommorrow until my body gets a little more used to it ? Or should I get back in there and jump straight back on the horse and see what happens in round two ?