I had a miscarriage in June 2012. My husband and I had intercourse on February 8, 2013. My period was due on the 13th. I didn't come until the 15. It has been lighter than a normal period for me. I have only had spotting on my pad, but when I would wipe there would be more on the paper. Last night I had a lot of tightening in my upper abdomen that felt almost like contractions, but with no pain. After having them for awhile I went to the bathroom and again blood in toilet on paper, but none on pad. I had these "tightenings" for several hours. Could this be early pregnancy or is there am I going through a change with my periods?