I'm 44 and I've really only had regular periods for the past 5 years.  My cycle is 25-27 days and I bleed heavy for 1 day then moderate to light for the next 1 to 1.5 days.  I thought perimenopause would mean my periods got irregular but I feel like they are just "shrinking".  Has anyone else had this happen in your late 30s to early 40s?  Also I am having horrible mood swings.