Hi Milly,

I had a chemical pregnancy (i hate that term! doesn't make it sound like a 'real' pregnancy....anyways...) last month. I had spotting from about 6 days before AF, which my ob thought could be implantation. unfortunately i was in hopsital at the time for something else and so wasn't able to check what my temp was doing. AF came bang on 14 days after O and was quite heavy - but I had only finished bleeding from a m/c a little over two weeks before that so it may have been unusually heavy because of that.
sorry it's probably not much help to you, but that was my experience. Oh, I did get a BFP two days before AF came and had two hcg blood tests to confirm that hcg was rising and wasn't left over from the m/c, so as much as i don't like to think of it this way, i guess i had two m/c in the space of a month - that was pretty crappy.

I wouldn't worry yourself too much about chem pregnancy unless you specifically knew you were pregnant. maybe it's just your hormones settling down after the m/c. Have you looked into Vitex to balance hormones? ( I think i already mentioned the B6 didn't I?!)

hope someone else has more definite answers for you.

Jules