Ongoing left knee pain

Hello everyone. I started experiencing some frontal and inner knee pain in November of last year. I used to be a pretty good runner and run some 10k races. My knee has been flared up for the last 5 months. Recently, I started to run again. I ran 1 mile last night and today I can hardly walk. I am so tired of the pain, I am ready to give up running all together and stick to cycling. When I cycle, I have no knee pain. I have seen a PT, chiropractor, and surgeon who all say I have tight and weak hamstrings and quadriceps. Any advice would be great.