Knee is shot

Basically the above header sums it up. My right knee is shotski, or on the fritz of it at least. It hurts pretty much no matter what and feels like it's going to buckle when I stand on it. Hasn't improved in...idk maybe a week. I have no insurance, nor vehicle, nearest grocery store is like a 30 minute walk.. Any ideas except ice and elevate? Or anyone have experience similar to this where you're not getting medically treated for it but managed to regain mobility? I'm not old enough to have a broken body, like, I will surely perish for it so any help is great. Thanks in advance🥲