Im very mad at myself for shooting up drugs...?

You could very well have gotten a disease. Theres more to it then HIV, theres also hepatitis, which is a fatal liver disease, could contract an infection from bacteria infecting the wound. Thus way you don`t do drugs with a needle. If you have to do dope, smoke it. At least you won`t get a horrible disease if you share. In 6 months go get a disease blood test done.