Sexy Time 🔥

Okay, so I just had sex because I've read it's a natural induction, and while I'm not trying to induce myself to have my baby right now, I am hoping it helps soften my cervix to get ready for labor (since I'm super close to my due date). Anyway, I went to pee afterwards and I had a slight burn in my vagina that lasted only a few seconds or so. Is this normal? Also, my lower stomach has started cramping as well. 
I'm a FTM so TIA for any input on what's going on or could be happening! :)