my boyfriend and I have been together for about 3 years now, we'll I have been taking birth control for about a year now and nothing weird has happened until.... I had sex the day after my period, and he did not wear a condom so he did withdrawal like 3xs or so, but I had my period, it was heavy but than I had my period again except it was light as can be, too light and I've done a pregnancy test but it came out negative, I've gained 3 pounds already and I am wondering is it possible to be pregnant and have a period like this? has anyone went through the similar thing before ?