I'm a little confused. Me and my partner had sex on the 24th & 25th January. Ovulation was the 27th January. I usually have regular periods, but I didn't start my period on the 12th February. I've been getting cramping in my abdomen, and feeling light headed. I did a pregnancy test this morning, and it shown a faint line in the test area. This afternoon, I noticed that when I wipe there was blood, which has started to increase in the past few hours. Could I be pregnant?