Well, anytime you have sex, you can become pregnant. You can't always rely on a condom. If the condom broke, or had a tiny microscopic hole in it, and there was more than likely precum, if he did ejaculate, then the answer is yes, you can be pregnant. If I were you, I would get on the pill if you are able to, since you are a are sexually active. This just seems like it would be more safe. I would wait it out for another week, then take a test if you still have no signs. You need to tell your husband though, because keeping this built up, is more than likely making you stress, which stress can delay your period. Just relax and take it easy.