Replying to Knee Pain

Skiing today and did exactly what you shouldn't do when falling. Landed backseat, planted one leg, twisted it and felt a pop. 8 hours later, no swelling, just pretty bad pain when walking and such. No real pain when sitting down, maybe a slight ache once in awhile. There are two bumps about a 1/2 inch apart right below my knee cap that hurt if you push on them. Going to make an appointment because I really don't feel like sitting in urgent care for half a day. Doubtful, but does anyone know what it might be?