I was diagnosed HIV positive a couple of weeks ago, and my local clinic have been nothing but supportive, despite my oddly chilled and laid back behaviour to the whole scenario. Since I visit them regularly for both STI and HIV checks, we've got an excellent timeline of when it happened (between mid May and mid/end of June), and I'm almost certain that I know who gave it to me, since I was quite busy with work I wasn't playing too much around then, and my initial illness fits in after I played with a couple of friends one nights (as in they are a couple too).
The local clinic has HIV sessions every Tuesday and Thursday morning where people getting treated come in to see the doctors, there are counselling sessions, group meetings, and even massages too. When they called me to tell me of the diagnosis they just asked me to come along to the next one and that they would be taking a lot of blood samples. Sure enough I was sat down with a doctor I had met only once before and the health advisor who had been seeing me for STI and HIV checks for the last couple of years. I wasn't overly keen on the health advisor because at every opportunity he was telling me how much danger I was running into by playing raw, despite telling him my reasons, so it was getting a bit annoying at times.
Surprisingly when it came to be his turn to talk as the doctor left the room, he was quite friendly about the whole scenario, as I thought he was going to give me an 'I told you so' type of lecture. We talked about what was going to happen next and he put me in touch with some other people to talk to, and even introduced me to one while I was waiting to get my blood samples taken.