What Does Sensitivity To Smells And Mood Swings After Periods Mean?

Hello. In the past week I have thrown up twice. I just had my period, so I don't think I am pregant although certain smells have started to bother me. I have been craving sweets like crazy, even though I generally eat healthy. My bowel movements are that great these days but that may be because of the sweets I've been eating. No swollen breasts, but I do have irritability, mood swings, and fatigue. Could I be pregnant. I have been with the same partner for eight years and never gotten pregnant before, so I just assumed it was something else. Could it be.