Should I go see a doctor for knee injury

[Chico34]

Hi there, I was riding a horse and my foot got caught on a panel and the horse kept going. This happened 3 days ago. It's hard to walk. I have swelling and pain on the inner side of my knee. I can bend my knee approx 45°. When I'm sitting or laying down I can straighten my leg but when I'm standing I can't seem to straighten it. My knee cap feels awkward when I try to. When I stand up from sitting i get an excruciating pain and blood rush feeling through my knee. My foot gets tingly and my knee feels hot most of the time. Is this of any concern? Should I go see a doctor?