Upcoming D&C

Found out a day before I was supposed to be 12 weeks when a surprise ultrasound showed no heartbeat. Baby stopped growing at 8 a half weeks. I was first deciding to miscarry naturally but after confirming the baby was no longer viable 2 weeks later, I made the decision to do the procedure. I'm scared, but mostly nervous. I don't go in till later this week but I had bright red bleeding after going to the bathroom and then the rest of the day it was just light and brown. Is this cause for concern and I should go to the hospital or would it be okay to wait it out till the day of the procedure? It's not heavy or anything. I barely get cramps which has me unsure if that's what they are. This was my first pregnancy so I don't know what to expect of this miscarriage.