Honestl it sounds like you may have developed a hemmeroid do to your session.
Yes I would recomend a trip to your Dr also have him run an std pannel including testing for HPV. Should you come back negative for HPV ask him for the Guardisil vaxcine as well have him get you all 3 Hep vaxcines.
I would caution you to make sure that you use rubbers as the best HIV prevention. HIV is not cured or easily managed. The meds make you sick, you may have a nasty time trying to find a combo that works. The biggest issue is price tag 28K a month is about normal. I have had HIV for 26 years it has not been a picnik, Able to sh*t threw a screen without hitting the wires, fatigue, arthritus after 2 years, and I am one of the lucky that ended up with HIV induced Epilepsy.
You may be worried @ what your Dr will think, but!!!! It is your responsibility to let him know what issues he needs to watch for to keep you healthy!!! This is not the 1950s 60s, 70s, 80s, etc. Your DR is not there to make moral judgments, he is there to keep you healthy and to treat any illness you may come up with. You also have the responsibility to protect your partners. Getting vaccinated for what is preventable puts you that much ahead. Sorry to preach but please take care of yourself.