help....

my period came on the 11th April and usually i get it heavy for 2 to 3 days n lighter for the next 2 to 3 days, this time the heavyness lasted a day n a bit then it was light for only around a day, i then got different types of pains in the bottom of my tummy and then on one day it would be like stabbing pains then the next it would be the pains i stil have it it like the pains i get just before my period and on it i then got tingley then sore boobs which i stil have it hasnt went away my period is not due to the 9th of may but i feel as if im on it, im so worried i have done stuf with my boyfriend but not sex at any time what is going on please help i dont no what to do.