Hi, I backed tracked my period cylce since octorber. And it bounced around from 29 days to 28. But recently I had a 31 day cycle where I had my period for 4 days. It stopped and I got it again 2 days later for 2 days.(my normal periods are 5 days long at the most) and now I got it again and its only been 26 days since my last period. Is that normal?