The most important thing you have to decide NOW. Look at the clock, was the exposure less than 72 hours ago? If so, you have the option of taking PEP. It is a combination of two meds taken once a day for one month. It will effectively prevent HIV infection. You may experience side effects. If you choose to go that route, go to the ER SOONER THAN LATER, tell them you have had an exposure to an HIV+ sexual partner.... 72 hours to begin.

OK, lets get this out of the way, I'm HIV+ (and I'll tell you before we fuck)

Of course he should have disclosed BEFORE having sex with you. Period. No excuse on his part.

Next, if a condom was used for all anal and vaginal penetration (you didn't specify your gender, but it is irrelevant to the exposure), you had safer sex. Nothing is 100% safe, only abstinence. Oral, is an incredibly low risk... near statistical insignificance.

Last, given that he failed to disclose to you, and made the decision about your risk exposure that was rightfully yours to make... I think you have a lot of room to make this next demand.

Listen carefully.

Demand to see his lab results, specifically, you want to see that his viral load is not only UNDETECTABLE now, but has been reliably that way for successive tests. Don't take his word for it, see the results with your own eyes, he's already betrayed that trust.

If he told the truth about that, he is correct, if he is reliably undetectable, and if you used a condom for penetration... your exposure risk was very small. You should however get a full panel test for all STIs. HIV isn't the only nasty bug out there.

Follow your testing centers guidelines for scheduling both a preliminary, and a follow up confirmatory test of either result for HIV. If you choose to take PEP, those guidelines will be very different.

I see you are from Argentina. Disregard all the cries to sue and prosecute. You live in a socially progressive country. He hasn't broken the law in your country. If you'd like a source I can dig that up for you.