Hi thanks for contacting health care magic. You have mentioned pain while movement and history of lots of exercise. So it could be muscular strain pain.... Avoid movement that causing pain.... Apply hot pads over that.... Take simple analgesic for pain.... Avoid strenous work.... If no improvement it could be by constipation or colitis like situation. Drink lots of fluid... If constipation there take over the counter psyllium like bulk forming agent.... Ciprofloxacin like antibiotic given . Excess spicy and fried food avoided. Fiber diet and fruits taken more. If still cause not clear USG done. Take care.... Consult physician for your condition....