If you have std symptoms once you start having them they don’t go away ? Because I thought I was having them

With some pain but cream cleared the dryness up in a day haven’t felt anything since ? I’ll still get tested either way but just want some info ! Also the guy I did oral with last said he was tested up until her the last girl before me but hasn’t gotten tested since her if he had sex with her condom free and ate her out and she gave him a bj then he ate me out kissed me and I blew him would I be having symptoms in my mouth and vag ?