I've got PCOS and have been on metaformin for about a month, my husband and I had sex on the 6th the night before he left for deployment..I had my period a week before xmas and now I'm a week late, I took a pregnancy test and it came out negative, and I've gott nauseated for the past four nights, (around the same time) i've had sharp pains in my breast (starting today) could I have a chance of being pregnant even though it came out negative? Could the PCOS have something to do with the negative pregnancy test?