My last period ended about 2 weeks ago and right now I'm in my fertile window phase and I have been having some little twinges and watery/ewcm but today I noticed there was some blood, it was very little and very faint but I could still see it. I have also been very gassy (burping and passing wind). Is this normal, like this has never really happened to me before and I don't think it means anything crazy because I'm a virgin (0 sexual contact ever!), so what could it be????