Dripped blood after I peed.

Cheryl
AF was due 8/1. I had no symptoms until yesterday 8/2 when I felt bloated. I peed, wiped, stood up and saw bright red blood drip into the toilet. I thought it was period so I put a pad on. 
​I woke up today 8/3 with nothing on the pad but with sore breasts and a little cramping.
​I blow these symptoms can go both ways, either AF is coming or early pregnancy symptoms. 
​I've never had blood drip randomly and not return. 
​Any thoughts of what could be happening?