im 28 years old and my tubes are tied and since then and before i have always had irregular periods . last week i started my period but it was very light and only stayed for a few hours and i thought i was done but now today four days later i started it again and it was very heavy now only a few short hours later its over again but im having back pain, fatigue and nausea im just curious if i should be concerned and should visit a doctor??????????????????