This is my concern. My cycles are always 25 days apart, and then this month I only went 16 days and cycled again. My husband and I are trying to have a baby and I am not if I could be pregnant and still having my cycle, and if this could the cause of the change. I have three children and with my first pregnancy I had my period the first three months, however not with the other two. Does anyone have any advice for me on this?