Replying to Hyper extended my knee. Need advice

Yo guys I hyper extended my knee this morning before work & when I straighten my knee I feel something's not right. It's not bad and I can still walk but with a limp cause if it bends to far I get a pain only in the front. Got any tips or advice to let this baby naturally heal before I decide to go see a doctor, Currently icing it but don't know of any legit exercises to help re strengthen it. I know a bunch of you have knee problems from skiing & this is unfortunately my first. Hmu in the comments would greatly appreciate it