Burning or Infection

Lately I’ve been having this issue where it burns down there now I didn’t have this issue till me and my boyfriend had sex repeatedly now I feel like that could be the reason but I also know for sure its not an infection cuz it doesn’t burn when I pee just burns when anything wet or with liquids touch that specific spot now I’m unsure if I have a uti cuz I only use the restroom when necessary but I still wanna rule out some things