It's not uncommon for women to have an irregular cycle once or twice a year if she is otherwise pretty regular. I'd say you're just having a long cycle for some reason. If you get to 40 days, I'd call the dr, as I don't think it's normal for cycles to change THAT drastically. I don't think you're pregnant though. Could be, but it's highly unlikely at this point.
, 39 years old; DH
, 40 years old
DD - 12
, DD - 9
(both from previous marriage), and me and DH have DS - 4