OK I can see keeping track of your thread is going to be very difficult (considering all the titles look the same). So to make it easier there is now a 'My Pregnancy Buddy Thread' section in your UserCP under 'Edit Your Details' (at the bottom).
(Quick Link:
http://www.babyandbump.com/profile.php?do=editprofile)
Copy the URL of your thead (by highlighting it and holding Ctrl and then pressing C on your keyboard).
and the paste it into the 'My Pregnancy Buddy Thread' and save.
Give me a few minutes and I'll put these links on you profiles for easy access.