Should i go to see my doctor for knee pain after a nasty fall?

About a week ago i went sledding and snowboarding and fell in the hard icy snow and hurt my leg/Knee. It still hurts me and i try to walk or if i bend down and try to get back up. and i sometimes have trouble getting comfertable in bed to sleep.there isn't realy and bruising that i see or swelling ive had a problem with the same knee before when i was 14 i fell on the hard floor in the gym at school whiel playing volleyball. should i go to see my doctor and see if i need an xray?