What is this pain in my crotch?

On Monday (3 days ago) I did a kickboxing class, and since then I’ve been having pain in like the left side of my labia, and kind of feels like it’s a bit in my vagina as well. Its not constant, but kind of dull, almost like a swollen pain. I can’t see any prominent veins or anything, but it’s not quite muscle pain. I’m 24 weeks. Has anyone else experienced this and have any advice for what to do? I took an Epsom salt bath last night but it didn’t seem to help. I do see my doctor on the 15, but am wondering what to do until then.