Sorry for your loss, how far along were you?
Blighted ovum are quite common and can happen to any woman, having it happen does not make you more prone to having it happen. Sperm meeting egg is just not always a perfect thing, and sometimes things do not develop as they should, very random.
The blighted ovum would be unrelated to how regular or irregular your menstrual cycles are.
Me- 45 DH- 44 DS 2 months old
girl on July 2008 at 19 weeks, Triploidy.
May 2010 MM/C @11 weeks
Aug 2010 "chemical"
October 2010 M/C @ 7 weeks.
Feb 2011 MM/C @ 10 weeks, this time twins.
July 2011 "chemical"
+HPT Sept 27/2011
Finally success, baby boy arrived June 08/2012, born after 37 hours of labor and unexpected c-section.