Fitness Update

So...I fell off the fitness wagon after the 5k.  Somehow all that training and the actual run has screwed up my knee.  Its not puffy or swollen but it hurts like crap.  I did manage to get on the Gazelle tonight then almost fell when I tried to walk across the living room.  Boo.  I of course will avoid the doctor at all costs considering I've been going too much lately for my liking after having the baby and being diagnosed with ulcerative colitis....hopefully something improves soon.  Anyone ever experience knee issues and have any treatment suggestions? I have iced it a couple of times.