Cramps on my left side a day after my period was ending, does anyone know why? Its my 1st period after a miscarriage 6 weeks ago. Passd everything.

Pelvic pain. It is difficult to say without seeing you or examining you, but sometimes a little blood leaks out through the fallopian tubes causing more cramps and pain on one side. See your doctor if it doesn't clear up within a day or two, sooner if it gets worse or if any fever or vaginal discharge develops.