Burning sensation after sex

My husband and I haven’t had sex in about a month because I’m in my first trimester (11weeks now) and pregnancy nausea and fatigue have made it hard to function at all 🥴 But last night I felt a lot better and we did it. Everything felt perfectly normal.

I always pee after, so when I went to pee it BURNED like crazy!!! I was trying not to say anything but oh my goodness. This never happened before. I felt really sensitive down there afterwards, maybe almost swollen, and it took a while for the pain to go away. Now it’s the next day and I use the bathroom and feel just fine.

I’m really confused—is this just a part of hormonal changes or a possible infection I don’t know about? 😓