Hello, I'm 18 and I've been having a rather abnormal menstruation. I started my period on the 6th of February.. and I've yet to stop. I have no clue what's going on, but I've heard that a womans menstruation can last this long without it being considered irregular. What should I do, and any ideas on what it could possibly mean? I haven't been feeling any different lately, mood wise or health wise. I've got no cramps, and my weight has been normal. Help!