I gave birth to my beautiful son in September and my periods started when he was three months old. We decided as it took so long to fall with him we'd leave it up to nature. My period cycle was 24 days then 27 days and then this month I'm due next week but I started last night. It is med/heavy flow and normal red bleed so ruled out implantation bleed. I have no other symptoms about from mild cramps. So ruling out pregnancy. Just wondered if anyone else has had such a short cycle.