Herpes can show up as soon as 1-2 days after intercourse. I'm not trying to scare you but herpes has become more common than most people suspect. The CDC estimates 1 out of every 6 people are infected, but unfortunately many aren't even aware (https://www.cdc.gov/std/herpes/stdfact-herpes.htm) although I've read as many 1 out of 5 people. The pain when you urinate could also be a red flag. When it comes to your health, I'd suggest not taking any chances and get a new doc or go to ER. Honestly, Id think it's worth the peace of mind knowing either way, inconvenient as that may be. It's the responsible thing to do, you wouldn't want to unknowingly pass something on to your next partner.
I'm sorry you're dealing with this, best wishes to you
With you exactly, so find a new OB-GYN and get an appointment. I agree this should not have come on so quick but you obviously have an issue that needs addressing. Only a detail exam will tell you exactly.