Dear friends on this community. I'm a male Japanese international student studying in London. I've done one of the biggest mistakes of my life recently. On 12th of January, night, I hired a male Italian sex worker. And he sucked my penis and I ****** him with condom (quite toughly). Because I always educated myself about STDs and HIV, although I knew sex with condom was safe, I still went to a sexual health clinic and and got tested on 28 of January. It was negative. However, I made another mistake. I hooked up with a 19-year-old Brazilian guy when told me he was negative on 4th of June. Because I was really careful about sexual health so I refused to **** him although he asked to. But I fingered his anus with bare hand because I thought it was definitely safe. However, on 5th of June. I found that there's a cut on my finger with which I entered his anus. I remembered that I had not short fingernail when I was fingering him and he asked me to stop several times because my fingernail hurt his anus. I started to panic: if my fingernail was sharp, then maybe I made his anus bleed a bit and then the blood could enter my body through the finger cut. What's worse, this panic brought my anxiety about the sex with the Italian sex worker guy back, I started to doubt the result because it's only 15 or 16 days after the intercourse and, he is sex worker! He must have had a lot of sexual experiences.. Maybe I was at the window period. I feel so scared now... could you please tell me if I'm really at risk of HIV? With many thanks.