My legs feel like they are swelling, as well as my ankles. The one ankle between the ankle and akiles hurts and feels tender. I went to dr thinking I had a bladder infection and instead told me it was a bacteria infection and have been taking Flagyl since for 2 wks now. I am worried thinking it is my kidneys. I was in 5th grade and was hospitalized for 5 days. Not sure what is going on but I am worried. Should I go to the ER?