My period has been randomly really light for the past couple months, whereas it was normal after having my daughter October 2013. They lasted 4 days, came right one time. I ve been having med to light back pain, light twinges of pelvic pain, light nausea and headaches that go away within the hour. Is this normal 11 months postpartum? I ve taken 3 home tests all negative. Should I get it checked out?