1 Time Partner From 3 Months Ago Says He's Positive; Now I'm Freaking Out.

Essentially, yesterday at around 6pm, someone I had sex with before (I'm gay, and was the bottom, and we used a condom) called and said he's tested positive for HIV. He has a boyfriend now, and he tested negative. We had sex around the end of March, and he tested negative in April. He also says that me and his boyfriend are the only two people he's slept with in about 9 months, except for a blowjob or two he says he used a condom for. We used a condom as well.

I was dealing with this fine, as I thought I would be able to go to Planned Parenthood this morning and get tested, but they don't do testing on the weekends. The only place that I can find that might is the Hospital, and they won't release your results for two days so they can get a confirmatory diagnosis. On top of that, they charge a bunch for emergency care fees.

I haven't been tested in about a year, but I keep freaking out that somehow I was the one who gave it to him. If he's being truthful about not sleeping with anyone else, the timeline just makes sense (it takes about 3 months from the point of infection to tell). I know the chances of transmission are low from bottom to top, especially with a condom, but I can't find anything definitive online. One of my friends got drunk with my last night in an attempt to calm me down until this morning, but now I don't think I'll be able to get tested until monday/tuesday, and I have no idea how to wait that long.

Can anyone tell me what to do, or help me out here. I'm terrified right now.

Update: I drove an hour out today to get a rapid test done, and it came back negative. I had her say it three times so I could be sure I wasn't mishearing her. She said I should get tested again in a month, since I was on the edge of the three month window, but that it was more of a precaution than anything. Thank you guys for all the reassurance, I definitely needed that to get through these last 3 days.