What is my knee injury?

I am familiar with Acl injury's, as i have had two surgeries in my left knee. At my soccer game last night I took a shot and immediately felt a snapp (not so much a pop) in my right knee. It hurt for a minuet but then was able to carefully walk off the field. It felt like it was hyper extending and catching when walking. Today I can extend it without much pain but bending hurts. Does this sound like a partial tear or a strain?