Hi im new to this site. I would like some advice please on my issue. Im 17 and i had unprotected sex at the end of last month (July). My last period was on the 15th of July but the last couple of months its came at all different dates its irregular. But im worried.. theres only at most, a 5 day gap between them each month. Ive been getting headaches a lot lately, everyday in fact. Ive been taking painkillers but still hasnt helped, ive read on the internet this could be one of the symptoms to expect, not sure if thats right or not.. i took a pregnancy test before i was due and came back negative which was last Friday and i am deciding whether or not to buy another test and try it in the next few days, i really have no idea what to do. Anyone got any advice for me?