I had unprotected sex last dec 11. Had a period with a little blood clots on dec. 31 until jan. 04 and another light bleeding on jan. 18-22. Again had a light bleeding with a little blood clots last jan. 27-31. I took few times of a home pregnancy test and it all came out negative. Last time I took a home pregnancy test was on feb. 02 and it came out negative also. Now already few days since feb. 12 until today, I am experiencing abdominal cramps like a period cramps but no period yet. I am getting worried. Am I pregnant? Please help.