I had sex 3 days before o'ing and the day of o'ing. We attempted to use the withdrawal method. I have a 29 day cycle always. Today is cd31 and I started a very light period today. It started out dark red-brown and there's barely anything there( mostly see it when I wipe) and after about two wipes, there's nothing else there for hours. It's enough to where I need a pantyline but not a pad nor tampon. So, period was late, way lighter that normal, I have had bad gas and constipation, very very moody, which is not normal for me around period time nor any other time. I took two hpt _equate) need 100miu/hcg to show positive, but it showed neg both times, 1st 1 at 14dpo and 2nd at 17 dpo. I usually have med to heavy flow (3-4 tampons a day). Could I be pregnant?

Sorry so long.. :?