I am trying to get pregnant with my second child for about 4 months. This month I feel pregnant. I had intercourse with my fiancé on thursday..then the next day (friday) I had pink & brown spotting then a couple hours later heavier bleeding that lasted until Saturday. Now it's Sunday which is also the day I'm suppose to start my period (I keep a calendar and it's pretty accurate on when I'm suppose to start)& all I have is light blood and with some brown & extremely bad cramping. Could it be a miscarriage or imantation bleeding or just my period a couple days early?