Clicking knee, inflamed tendons and ligaments, what's going on ?

so i'm a runner running long distances at the moment when i woke up one day and whenever i bent my right knee there was a clicking noise whenever i ped a certain point. After a couple of weeks it began to get sore, stif and continue clicking so i went to my GP who compared my knees. She asked me to extend my knee and said i was 2 degrees out? She also said that the tendons and ligaments were inflamed at the back and front of my knee causing the mild pain i got. She said the clicking noise was because a straw like structure in my hamstring was getting caught causing it to click and that everything was probably caused by the impact of running and growing because the bones rotate when you grow. But the clicking was coming from my knee? She told me to rest up 4 2 weeks and do some swimming and cyling. The funny thing is when i ran it didnt hurt. After a week of rest my knee feels worse. It still clicks is stiff, sore and just doent feel strong. I bought a support will that help?