Please help me doctor!!!

Dear SIr,
I'm a 23 year old boy and a 4th year Medical STudent. I recently ( 2 months back) had sex with a prostitute....I'd used a condom...

    But during sex,My fingers were contaminated with her vaginal fluid (PROBABLY INFECED WITH  HIV)....And, then I mistakenly touched my penis ( after removing condom) with same hand...But, my hand was not so wet...It ws just that I touched her vagina only....

         Now, I'm having weakness for more than 4 weeks esp. muscle weakness....SOmetimes I can't even hold a cup of tea...it gets fatigued very easily....Beside this, I don't have other symptoms.....Please help me....I'm dying with tensions....

I'm having my final exams after 2 weeks... can't even concentrate in my studies...

          When I think of my family, I feel so much worried...I'm not able to take further my studies....

Does mental tension also cause prolonged muscle weakness???

What might be the reasons for muscle weakness?? Depressons,Tensions???

         Please provide me with good solutions....Do I need to do tests???

Thanks.