3 periods in a month
I am 22 yr old female, not on the pill, no kids, normally on a fairly regular 35 day cycle. But in the last month I have had 3 periods; the first was about 2 weeks early & I attributed this to having taken the morning after pill about a week earlier, & it was quite light and lasted for about 3-4 days (normally my menstruation lasts about 7 days), but after about 6 days I got another period which was a normal length & heaviness. I assumed this was just my normal period starting. However a week after the 2nd period stopped another started, which was very very very light for 2 days but has suddenly got very heavy, I have to change tampons 2-3x more regularly than I normally would on the heaviest day of my cycle. I don't have any pain or cramps (but I don't normally have this with a normal period anyway) but I have been feeling quite light headed and nauseous, with very little appetite, for the past 2 days. Is this likely to be something serious or nothing to worry about?
Also, my period prior to the first of these three only ended about 10 days before the next started, but before that they were normal.