My periods are lighter and last 2-3 days am I pregnant?

My periods have been really weird for a little while but just this month I noticed that my periods only lasted 2-3 days and were super light . I have been feeling like vomiting, my stomach rolls when i smell things they seem to smell stronger, my belly feels tight, my boobs feel harder and my nipples are darker... all i want to eat is chicken, I get too hot to easy, I sometimes don't feel like eating food, and the aorela has little bumps that are more poped up than usual, I also have veins that are more poped out than usual and depression that is really high since last week.... is it possible that I could be pregnant ?