Hello, I Have A Problem And I Just Do Not

Hello,
I have a problem and I just do not know what to do anymore. I am a nineteen year old female. In ocotober I ran a marathon with very little training (I had achilles before and before the marathon managed to get in two 10k runs, I run it literally on stubborness), before my achilles I was veryactive 10-30 k runs almost every day. After the marathon my feet started to hurt enormously (which makes sense)...I allowed myself to rest. The pain is my ankles started to improve, but in January my hands started to hurt...better said, joints. I got very worried and went to see my doc. After the blood tests were done (I am also a vegan)..it was perfect, no factor signalised anything. I was sent home...and told that it is problably related to the marathon. Slowly the pain went away, the ankles were still healing but improving amazingly. I went for a run...a short 5k run two weeks ago. Then the pain in my right hand started again, followed by slight pain in knees and ankles.

What do you think I should do? Because...I just do not understand. I get the pain in my ankles, but I do not get the pain in my hands. Rheumatoid arthritis, there woud be factor present. It has been so many months and it is...the pain is rather annoying. As far as I know...I got all the blood work done...as my doc was thinking about rheumatoid condition as well. I got also tested for Lyme disease and sent to X-ray....but nothing was found. This all happened in January, though. (After the primary pain in my hands.) Yeah I also had Ig A a bit higher (but still in the normal amount more or less) and also basophils slightly increased.