I am 27 years old. My period was supposed to start today (or within a couple of days), but it hasn't yet. About a week ago, I started experiencing some spotting. Lasted about a week. It started pinkish for about 1 day and then turned into brown for the rest of the week. There was about 1-2 hours on the third day that it turned into red spotting. I have always had regular periods every 28 days (occasionally 30 days) and have never experienced spotting before my period. Also, for about the first 3 days of spotting I did have some light cramps. Mainly felt like I was going to get my period, did not feel like normal period cramps. I did have a miscarriage in December. I have taken about 4 different pregnancy tests. The first 1 I took came back VERY faint postitive (was pretty early), but the rest have been negative. Could I be pregnant or should I be concerned?