i started my period 12 days ago with no pain and it was light but now the past three days my period has gotten really heavy and the pain is unbarable and it doesnt seem to be changing ive always had problems with my period i dont get them i get them about once a year but never in the middle of the year this is the first time. Am worried ive never in my life had a period as heavy an painfull as this what should i do?