So about eight months ago i hyperextended my knee. I didn't end up going to the doctor because of a lack of insurance. The pain and swelling went away and everything seemed like it was healing. Today i woke up and was unable to bend my knee past 90 degrees. The strange thing is that sometimes I can bend it all the way back without any problems, but this happens less than my inability to bend it. I am 21 and I live in Colorado and snowboard pretty consistantly but like i said i've had no problems until today. The pain feels like it's in the center and left side underneath my left kneecap. I have been debating getting an x-ray or mri but would like to get more information before i dish out the money. Any help or suggestions would be much appreciated.