Why is it paining at tibial end of my left knee,i have got acl reconstruction on this 24th?

sir, after acl reconstruction surgery[ no meniscal tear]using bioimplants,i could walk on crutches for first 4-5 days,but now the moment I put my leg down from bed, there is unbearable pain at the medial side of my knee joint robably tibial bone , so again I am forced to lie down and iam not walking since 2 days.This tibial pain was there after 24th but bearable ,but now its unbearable, even at rest pain is thr but not severe.

placeholder text for bug in Chrome