I would add if you cant post a video, then try to see a professional instructor. they may be able to spot a problem with form causing the pain. also to add to what others have said look at your diet.even if diabetes is ruled out a bad diet can cause other problems. one that was mentioned was low potassium, if diet is lacking in all essential nutrients pain and other problems can occur. being 17 i will go out on a limb and state that pizza, sodas and energy drinks are not a well balanced diet. just my 2 cents (and watching my son and what he ate)
Mike