I'm nearly 9 weeks pregnant with number 2 and was just musing (whilst feeling terribly sorry for myself!) how your pregnancies (if you have had more than 1) are different.
I started off this pregnancy as smug as could be thinking it would be just like DD--that crippling exhaustion and hunger but nothing else besides that. A smooth ride most of the way!
And then 6 weeks hit and the nausea hit me like a tonne of bricks! I've not actually been sick which I'm very thankful for, but the constant nausea, how do people deal with that?!
I constantly feel like I want to be sick. The thought of coffee makes me sick. The thought of a vegetable makes me sick. I am a carb monster (was so determined to be healthy during this pregnancy as I ate rubbish the first time round) but the only thing I really want to eat is toast, crisps and tomato soup!
Horrendous back pain, god awful heartburn, I cannot get a full nights undisturbed sleep (with DD I could go to bed, close my eyes and sleep for a solid 12 hours if I could!) I'm working full time now so no opportunities for 2 hour naps before work like that last time.
I'll keep repeating "it will be worth it" and console myself with the fact that it won't last forever, but if you could come share in my misery with your experiences it would make me feel much better 
(I shall also take this moment to say I realise how lucky I am, a good friend had hyperemesis with both her pregnancies and was in and out of hospital. I don't feel I can moan to her as I AM a total wimp)