I have NEVER, since my first one, missed a time in my existence. My cycle has NEVER be longer than 28 days (mostly 26 days in length). I am presently 1 week late. I am have bouts of nausea, tingly sensations in my breasts, tired all the time, and the pregnancy test I’ve taken say glum. Could this be a false negative due to my counterweight (over 400 lbs.)??