I'm peeing my pants a lot....

I know this is TMI, and super awkward for me to talk about. But I have been finding myself suddenly having to pee so bad that I end up peeing myself. It's awful. Someone please tell me why is this happening to me?! I'm 18 years old about to graduate high school and I am legit peeing my pants. Thank God no one has seen it yet, but this is getting out of hand. I shouldnt be having this issue. Help?!