about 4 days ago i started having a problem w/my left knee. i don't remember hurting it, but it is really bothering me and is only getting worse. i have an appt. w/ an ortho. today. it doesnt hurt to walk on or whenit's straight, but when i bend it it kills me and feels really tight like a band is around it and like itr is bruised. I have to take my hands to straighten it back out again. it's weird. has anyone else experienced this? It's just strange since I haven't(at least I don't remember) injured it. Most of my sx usually occur on my rt. side and this is on my Lt. I am still at the probable dx stage.