AF/cycle changes well into mommyhood

Amanda
Have any of you experienced a drastic change in your cycle from pre-baby to post?  Mine was 27-28 days for many years.  Now, a year and a half after giving birth (and a year of having my period back) my cycle is all over the place... anywhere from 28-45 days and super long bleeds (7-9 days).   Just wondering if anyone else has experienced this because it's making me CRAZY and my OB said usually having a baby makes your hormones more regular, not less.