For a couple of different reasons such as nausea, increased sense of smell, and breast sensitivity I thought I may have been pregnant. I took a test and it came back negative and I started my period a few days later. It was red and I had cramps but it only lasted 3 days. Looking back on it, I didn’t bleed that heavily, in fact I barely bled the first day or third day and it stopped so abruptly. My period is usually at least 5 days and tapers off. Should I test again? Or is it in my head?