I’m a week post op from ACL and meniscus surgery

I’m a week post op from ACL and meniscus surgery. I had the allograft. 1 day ago I’ve developed sensitivity on the back of my knee… feels like bruising, but doesn’t show a visible bruise. Can it take a week for bruising to show up?? Or for sensitivity to show up a week later? It’s super tender.
My leg isn’t hard, or red or hot to the touch and I’ve been on baby aspirin 2x a day since surgery.

okay- makes feel feel better. I figure, sure they went in through the front of the leg- but legs aren’t that deep so I’m sure all the stuff getting bumped caused tenderness.