My fiancé and I have been together for over 2 years and we have NEVER used protection. He had a vasectomy 3 years ago, but never got the follow-up testing to see if it was successful or not. My period is 13 days late today, I've been constipated, bloated, heightened/altered sense of smell, mild uterine cramping, vivid dreams, and mood swings. I took 2 pregnancy tests and both were negative. What do you think? Could I be pregnant? What should I do?