Before my last period was due i felt very pregnant (weird abdominal sensations. Boobs more sore than usual), but period came 2 days early so assumed I waa wrong. Period lasted 4 days instead of 6/7. But now just 14 days later I am having another period but it's extremely heavy, making me light headed. I'm wondering if it could be a miscarriage? My period were irregular while I was breastfeeding but have become much more regular for the last 6 months.