STD/I or UTI???

So I had unprotected sex Wednesday night and since then I’ve been having this weird feeling when I pee. Not necessarily while the pee is coming out it happens right when I’m done peeing like when the last of it comes out it’s so weird I don’t know how to explain the feeling. It’s kind of a burning but not really?? Kind of feels like a lot of pressure?? I’m so confused and worried. My boyfriend and I have always had sex without a condom and I’m clean and he’s clean unless he cheated on me and caught something????

So I haven’t gone to the doctor but the feeling is gone now??? It just like when away