Jen. My child is now 1 1/2 and I could have written your post. Mine was very intense straight after birth, I started getting palpitations - which I mentioned while I was in hospital and they just basically ignored.
It was so bad at the beginning that I missed out on a lot of things and social activities because of my anxiety.
When my periods came back at 6 months it started to get a bit more of a pattern to it and I noticed it was starting off about 10 days before my period was due and then would tail off a few days after my period started.
This is like clockwork now every month. It gets really bad and this month - yesterday - I was stuck down with fear in the supermarket. I have been having a heavy hearbeat for a couple of days solid.
If you read this:
http://en.wikipedia.org/wiki/Premens...horic_disorder
this sums me up to a T.