I Am 7 Wks Post Op From A Major Spine

I am 7 wks post op from a major spine surgery. I had 25 yr old hardware removed from L3-L5 and then the disc removed from L5-S1 and bone grafts done. They then put new hardware in from L2-S1 to make it one piece then put iliac wing screws through my SI joints to make it all stable and immobilize my SI joints. It was a very big surgery and I'm a really small person so it's been rough but I've noticed since I came home from the hospital after spending 9 days in there that I keep getting huge dark bruises all over my upper legs and thighs. Does the bruising have anything to do with my surgery? I don't want to panic but I've never had bruises like this and I'm not doing anything to get the bruises