I had a miscarriage in the beginning or the year. Since then I went on birth control for one month then stopped. I stop taking it because it made my period come too early. I got my period on March 23rd. My cycle is usually 31 days. My bf came in me on the 8th and 18th of April. My stomach is cramping the same way it did when I was pregnant the last time but when I took a pregnancy test on the 18th of April it was negative. Could I be pregnant?