No std likely. Given it happened right after. Gonnerhea/chlaym.. takes 2 days soonest scenario to be in system, herpes takes 2-21 days. Hpv 2 weeks on average to whenever. HIV not possible to be given orally. One documented case ever. This is quincedental. No sores within 2 weeks makes any std unlikely. Plus a sore wouldn't even confirm it's an std. sores in mouth can be canker sores, which are unrelated. You are good