Itching below the belt

Moochee

So my partner and I haven't had sex in a couple of weeks.The other night he did try bt I wasn't interested.And he tried hard smh.any way now my cooch is kinda itchy.It only hits me at night seems like.Idk if it's frm him or my body wash or whatever.Idk if it's a uti,a yeast infection,or a sti.IDFK

WYF TO THINK OR DO!