Had brown discharge at the time of period. extreme bloating and weight gain with huge belly over few months. pain in legs.what could this be?mild pcos

Wt gain, leg pain: In PCOS do have weight gain and increased abdominal girth. But check for thyroid, diabetes and HCG, unless you have been having monthly periods. Leg pain may be from weight gain - parasthetica meralgia which is pain in the thighs from nerve compression due to weight or may be sciatica from weight gain but would also consider u/s or CT abodmen, if HCG negative to r/o other cause f/u/ w/ do