I'm male of 34 years old. I have had a single episode sexual relationship unprotected sex with a woman in August 31 2011 and evening of same day i have had sharp head pain but it remains only 2 hrs and gone. I dont know about her status. I was sexually healthy and no STD at that time but from next day i felt mild burning pain in the top of my penis and same in urinary tract. So i took Metronidazole Tablet 400 mg for 7 days course (3 tablet in each day), Azithronyein 2 tablet of 500 mg, Cifran 500 mg of 10 tablet for 5 days course and Polybion 250 ml Vitamin B complex syrup. I used the above mentioned tablets without prescription of Doctor and i drank alchohol in the middle of Antibiotic taking. After 10 days of first exposure i felt mild fever, unusual (strange) headache like confusion and nervousness and physically weaken (numbness of arm and hand), tingling of feet including chest and back pain but no symptoms of flu, skin rashes, gland or other symptoms of HIV so far. Is this only side effect or cause of overdose / side effects of Antibiotic taking or symptoms of HIV? I'm very worried now and want to know about the probability of my HIV infection.