You just never know the coke is mixed with. you could be allergic to whatever **** they are mixing it witj
normally you are having a reaction to whatever it was cut with when this happens I am still sleeping
normal you are having a reactions to whater ever the coke was cut with
The only times i have had an allergic reaction to coke was actually cause i would sweat heavydue to taking large amounts and then my back would itch and be red sometimes. I have also heard of cocaine bugs which is more just mild hallucinating effects after using cocaine. I strongly suggest you stop using this drug as your playing with fire. An allergic reaction will go away after using cocaine, but that is nothing. Even though you have not used much, I would be more concerned about your heart exploding which will be a very painful agonizing death, maybe a stroke, hole through your nose and much more. If you become addicted to this drug, you won't stop. Good luck and lay off the blow.
P.S. You are NEVER sniffing pure cocaine, it is always cut with something and could be anything. You could be having an allergic reaction to cutting products also. Nothing better than sniffing some baking soda and drywall, yum.