What do you recommend if i had unprotected sex with woman with hiv 7 weeks ago?

Don't do it again: This would be a good time to get an HIV assay, perhaps a PCR. Your physician is your best guide. HIV isn't very contagious and your risk of infection is small. Doing this sort of thing is also a great way to get gonorrhea, syphilis, herpes, chlamydia, six or seven other things, and end up an Unwanted Father. Still -- I hope it's an experience you'll cherish. Love's a many-faced thing.