Hello
I'm a 15 years old guy, and about 10 months ago I had sex - for the first time - with a 26 years old guy. We had met through a chatroom, and became friends afterwards. We decided to see each other in person only 6 months after we met. Due to the somewhat vast age gap, I hesitated at first whether to have sex with him or not. Then I decided that age has no importance at all and since I trusted him, I agreed to sleep with him.
We had safe anal sex (me being bottom) using condom. I can't know whether a break has occurred during the intercourse or not. However, later at some stage, he removed his condom and wanted to continue sex without it. He was close to penetrating me when I realised he wasn't wearing his condom, and I can't remember whether he touched my anus at all, but I refused at once and told him to put on another one. Moreover, the oral sex we had was, of course, without condoms.
I am VERY occupied lately with the issue and I'm afraid I might have got HIV. I trusted him before and I do now. I asked him if he has been tested and he told me yes and that he is certainly negative. He told me to stop worrying and if I keep thinking about the issue too much, it'll be hard for me to have sex with anyone. We're still in contact so far, and it's hard for me to think of him as a deceiver, but I can't stop worrying. Many people probably trusted their partners and got HIV at last, didn't they?
Why do you think he wanted to penetrate me without a condom? Did he want to get me infected, or was it because it's just more fun that way? (I don't know because I never tried it) The age gap increases the anxiety even more, had he been playing on me and exploiting the fact that I'm young?
I don't know what to do. Do you think I should take the test? I really want to take it so I can be sure whether I'm negative or not, but I don't know where to go and what to do. It's restraining me from moving on and searching for other partners because I don't want to get anyone infected, if that was the case (God, I hope not

) Plus, blood tests are recorded in one's health card - are HIV tests recorded as well? Because my aunt is a nurse and I really don't want her to know that I took the test, it's quite embarrassing. Is there anyway to do it anonymously?
Please help..
Thanks in advance.