It is just from soccer. Overuse from muscles can lead up to the nerves and bruise tissue. It is just temporary. This does not sound like MS.
I can sure see why you would have these concerns. Have you seen the neuro since these symptoms began? It is always possible that anxiety is causing your problems, BUT if you feel they are happening, you need to be seen by the doctor again. Even if it is Anxiety, there is a treatment plan for anxiety and it should make you feel better.Please return to your doctor(s) and get their opinion and suggestions for treatment. ~Laura