M.,
I too have had a tubal after my 3rd child was born, nearly 3 years ago. I also was always regular. However, I've noticed this past year that I have gone late a few times and early a time or two. I think it was just stress that I was under. However, unlike you it sounds, I would love to be pregnant. My husband and I wish we never had the tubal. We said "no" at every DR. appt for 9 months and then just before the scheduled C/S they asked again. Well no Duh! I'm 9 months preg. miserable got an IV in my arm and about to get cut open for the 2nd time. Yeah, I think I'm done. I think they shouldn't have asked again. WRONG< WRONG, WRONG! Good Luck. If you are still late in a week I would go see a DR. Keep me informed.
L.