Yestday , i had sex with a women unkown status, when i am nervous i bide my nails, and the skin around my nails. So i bitted the skin around my finger and it began to bleed, and this happend 20 mins before the sex. But still i fingered her with that finger wich were bleeding, so stupid i am! i am so scaryed now. What are my chances of contracting HIV or other STD,S?