Wow - I can relate this very well. Cociane made me very ill - I was passing blood and had stomach pains for 3 months after I stopped using.
The last time I used I remember laying on my bed sweating like I had just got out of the shower and I think I passed out - this was then made worse my 2 days of panic attacks. I have never been so scared in my life.
Please do not ignore the symptoms - when your body gives you a sign then its time to stop.
I cant believe that it took something so bad to stop me using - please lsiten to your body as its trying to let you know that it can't handle the drug.
I am lucky as I have done no serious damage to my body.
My advice would be to see a doctor and seek some help - this is what I did and I am almost 11 months clean.