i had unprotected sex about two months ago (early and mid october) and ever since then ive had really abnormal periods and signs of pregnancy. in the middle of november i took 4 pregnancy test and one test at the hospital all came back negative. i did have a child already Jan. 20, '09 and maybe this is all due to that? i dont know im just really freaked out... is it possible i can have a period (even abnormal) and be pregnant?