you are you are doing very well.
pain in the area may be due to activities you took causing fatigue
and the after exercise pain . this may be due to prolonged activities that you were not in for long time
hope this will disappear in some time
If the pain persists ,please consult physician and get a check up .
For pain you may take paracetamol
Tab carnitior and vit E as adjuvant may be helpful