Ovulating late in the cycle

I just found out I ovulated on day 28!

In previous cycles, I'd typically ovulate somewhere between days 12 and 16. But for some reason this month, I didn't ovulate till day 28.

My poor husband... he's having to deal with this whole "sex on demand" issue and we are BOTH confused about when's the right time to do it, but he's making an effort to be accomodating (though I suppose there are worse things to help your wife with... probably beats cleaning the garage!).

Anyway... day 12 came around... then day 13, 14, 15, 16... I just kind of assumed I must be ovulating, even though I wasn't showing any particular signs (except maybe a small amount of cervical fluid). But the OPK showed a negative result, and there was NO ferning on my ovulation microscrope.

Then, on day 28, after going to the bathroom I noticed a good amount of cervical mucus on the toilet paper. So I took a test and sure enough... it was positive. I also had a lot of ferning on the ovulation microscope, AND I could feel my ovary on my left side (it was huge). That was a few days ago, and now that I'm post ovulation I can no longer feel it.

I don't really understand why I had the delay in ovulation. Supposedly it's most likely to happen when you're under stress or your diet changes, but I don't think I was under more stress than usual this month, or made any drastic changes to my diet.

Anyway, I read about "late ovulation" online and supposedly my chances of getting pregnant this late in the cycle aren't good... the endometrium lining may not be as good. But it doesn't help to try, right?

I used the instead cup, tried to drink plenty of fluids, and laid down for about an hour after sex. Took my supplements, including primrose oil and guafinesin pills. I did have some decaf coffee though. Twice. With about 1/3 cup regular coffee. And half a pint of beer. Guess I'm going to have to wait and see what happens...