So this past cycle I was on antibiotic for strep. My boyfriend and I were having sex, and he wore condoms everytime we have had sex he wore one for the whole month. I recently had my period, and I was wondering can I have only negative results and still be pregnant? would results show up a week after my flow ended? I have been have stomach issues that seem like ibs, but sometimes I get my self worked up that I am pregnant, and that the stomach cramps and pains are because I am pregnant not actual stomach issues. also i have never missed a pill, and the latest I have taken them is maybe 2-3 hours after my usual time.