Laparoscopy, Hysteroscopy, D&C, OvarianCystectomy

Nicole • (>-.-)> ❤️<(•.•<)
I had surgery a week ago today. I had Endometriosis, an ovarian cyst on my left ovary, and polyps and cysts all over my uterus. 
I went it to get it all removed and the following 4 days were extremely uncomfortable although not as painful as I expected it to be. The Doctor prescribed a Percocet but I felt I wasn't in the amount of pain needed to take something like that, so I took Advil when needed. 
I've been discharging since that day dark red/brown, but today it is bright red and my cramps are worse then before. I am scheduled to start my period in 2 days but I'm scared; hoping thats what it is and not something gone wrong. Anyone been through this as well?