well i got my 3rd period jan 29 and i was really grouchy and i had bad cramps i went home to use the bathroom and there was my period. I only lasted one day and it never came back is there something wrong with me. WHAT SHOulD I DO!!!!!!!!!!!!!!
When you are younger it takes a while for your periods to get regulated. You will have varied cycles and may skip months inbetween periods. This is normal. If they don't straighten out after a year or two then have the doc check to be sure everything is ok. For now don't worry about it.