Drunken mistake

I am a 22-year-old gay male.

Two weeks ago, I made potentially the worst decision of my life and drunkenly agreed to condom-less anal sex.  I was the receiving partner.  He ejaculated in me and the next day there was blood in my stool.  This was the first and only time I have had sex without a condom.

The other guy swears up and down that he is HIV negative.  I know him (this wasn't some random guy), but I don't know him well enough to completely trust that he is tested regularly/recently.

I am planning to get tested at the three-and-a-half week mark, three month mark, and six month mark.  In the meantime, what are the approximate odds that I have been infected (I realize there is no foolproof way to pinpoint odds)?

Thank you for any help you can give to keep my nerves at a low before testing.  I have learned my lesson the hard way.

[cna341]

you had put yourself at risk by having unprotected anal sex.most people will not lie about their HIV status but:1some of them do 2.some of them are unaware of their HIV infection
a test after 12 weeks is all what you need.not 3 and half week or 6 months.
if you want to have a good indicator of your status you can test after6-8 weeks after your sex but only a test after 12weeks is fully conclusive.

[tomMulligan]

One time exposure from a person you have known is unlikely to transmit HIV, take note most people don't lie with with their status. . However an exposure is always as an exposure. 6-8 weeks is the greate indicator of your status. 12 months is the conclusive result.

You can have him go for a test also to ease your anxiety. If he's clear then the odds is all in favor with you.

[Teak]

3 months is conclusive and never take anyone's word on their status.

[Hope242]

I'm sure Tom didn't mean 12 month :) 12 week's is conclusive

[tomMulligan]

I mean 12 weeks  not 12 months.