What is this!!!

So I’m supposed to start my period soon. All the symptoms are there,boob soreness, backache, acne nausea ect. Well today i was sitting in bed doing work and all of a sudden i feel wet kinda like the feeling when your period starts. So i go to the bathroom and it looks like i peed myself, it doesn’t smell like pee and idk if it could be discharge cuz it was liquid. Has anyone had this before.