What would make my cycle lighter and last shorter days? I am not on birth control, but my menstrual cycles seem to be getting lighter and lasting shorter periods. My cycles use to last 7-8 days, but this month and last they have been cut short. Looks like I stopped 3 days into the cycle last month and then started back the next day. And this month. I started a little earlier, instead of going 28 days with no period, I went 26 days. I was heavy the first two days and after that my cycle was sooo light that I began using the very thin padding. By the fourth or fifth day I had no cycle. What would be causing my menstrual cycle to be cut short? I know this time, when I stopped flowing early I felt as if I was going to start on my cycle which was weird because in actuality I should have still been on my cycle. I'm worried. Does anyone have any suggestions about what may be going on with me and why? Has anyone experience what I'm going through? Could I be pregnant? I took a EPT pregnancy test right after my cycle stopped and it tested negative. I don't feel pregnant, but I surely stay sleepy alot. I could sleep all day if I had the time to. I have heard that you can be pregnant when you are on your cycle. I have never had wrong pregnancy test results. I have also been a little nauseous, but usually at night and not so much morning.