Ive messed up my birthcontrol for the months of July and August. either by a day or two or by timing. I had unprotected sex on August 13th. However had irregular period the week before, light brown spotting, then it stopped. we had sex and the next day it started again, but not a normal period. I haven't gotten my period since. Im not sure which of those 2 weeks would have been considered the normal one. I took 2 home tests both negative, then I did a blood test on Aug 31st, said negative. I have all sorts of symptoms (i am a mother of a 6year old, and remember the symptoms) Is it possible I am pregnant and just started testing too early?