I found out a week ago on Saturday - and only because I logged on to FF, wondering when my period was due, to discover that I was 3 days late...
This must have been my first 2ww since starting TTC last August that I was too busy to symptom-spot. It's also my first 2ww in the year of TTC that I had no symptoms whatsoever. Read into that whatever you like!
I've felt on-and-off tired for the past 2 weeks (but that can be attributed to being busy so may not be pg-related). I occasionally feel nauseous, but not sick - and usually if I haven't eaten for more than a couple of hours. The most obvious 'symptoms' are that I am VERY hungry, VERY thirsty, and need to pee a lot (the last could be related to the first two!). I went through a couple of days of flatulence, but that could be due to institutional food, as I was at a conference... Oh, and my breasts seem to be larger - my nipples definitely are.
To be honest, the only real symptoms that couldn't be attributed to anything else are that my period is now almost 2 weeks late (for anyone wondering, I've dated my ticker from ovulation, not first day of last period - my cycles are irregular and I have a short luteal phase), and I have a test line stronger than the control line on the HPT. I'm hoping the lack of symptoms isn't a bad thing!
Good luck...