What is going on with my body??

I had sex 2 months ago, and I had my period the full 6 days, but it wasn’t nearly as heavy as it normally is. I am currently a day late for my period this month. This part is going to be tmi, I’m sorry lol! I was on my way to the post office and I farted. I thought nothing of it. As I sat down in my car I felt wet down there. I of course checked hoping it was my period, but unfortunately it was not. I shit myself. This has never happened to me and I’m wondering what is my body doing. Do you have any ideas? Thanks!