I accidentally opened the car door bang into the middle of my kneecap in mid-August. It was really painful and I iced it etc.
I then had a really bad back for which I was taking Tramadol etc.
Back is better now and I had forgotten about the knee, except that now it is painful (diffuse) if I so much as lay my hand on it. In fact, my skinny jeans are causing me problems today.
I need an x-ray, don't I?