Hi guys, recently(4 nights ago) I've paid a visit to a transsexual sex worker. We both did bj and there wasn't any intercourse. However I wore condom and she didn't.  I ejaculated in the condom, she however ejaculated into my mouth. I immediately spat it out and gargle with a mouthwash. There wasn't any cut or ulcer or anything in my mouth. What are the chances of me contracting STD? And which STDs I likely to contract since there are so many different STDs? I've also learnt about the incubation period, and so when is the best time for me to get check / STD screening?