Hi, I was due my period on the 23rd September but I had unprotected sex on the 21st, I haven't had what I call a proper period I've just had on and off really light bleeding since the 25th, I know it's far too early but I took a pregnancy test on the 25th while I was bleeding very lightly and it came back positive, I did another test a few hours later when the bleeding had stopped and that test was negative..can you please help me? I don't know what's going on :(