Hmm...my symptoms so far:

Sore boobs *L* (I'm normally a small-B cup - I SWEAR they're already bigger)
Headaches - don't normally get these; they were really bad for two days right before I found out I was PG.
Cramps - arggghhh...combination of dull to intense period like cramps & intense wind cramps. Sometimes it's hard to tell which is which; of course it has made me stress out.

I understand the checking the undies thing everytime you go to the loo. In fact the moment (TMI - sorry) I feel any moisture, I rush off to the toilet to double check. Seriously, I think I'm going loopy! *LOL*