Well, today it was 36.25, so it says I ovulated on CD12.

That is absolutely bizarre, because my last two cycles were really long - up to 39 days.

So since I went off the pill I've had two x 28 day cycles, and two long ones and then ovulated early in this one :-k . Suppose it takes a while to settle down after being on the pill pretty much constantly for almost 16 years.