hi im 21 years old and i didnt have a period for 4 months and now ive had one for at least a month now, im bleeding very heavily and passing large blood clots often, this is the second day in a row ive bled through a super tampon within an hour or less than an hour, and after i bleed through i get very tired and light headed, should i go to the ER or should i make an appointment with an OBGYN? im really freaked out this has never happened before ive always been regualr, help?