had my period on the 01/04 and spotting in between and had another on 21/04 and spotting again, my next period was due 15/4 and only came 19/4 and was heavy the 1st 2 days and stopped, im experiencing some Cramps, though not as bad, took a hpt but it came negative, Im confused if im pregnant or not as i have all the symptoms, can someone with similar problem please help