Oh God does it have to be just one?
Having finally (at about 17 weeks) got past the horrible nausea and aversions to everything and everyone - well, no, I still have several aversions, including Sainsburys, the car, and the bathroom (I know)
I now have a stinking cold and a horrible cough, which I am convinced is going to turn into a chest infection, and every time I cough it makes me gag.
The extreme, extreme tiredness was a new bonus for this (third) pregnancy but that has now GONE (thank Goodness) it was like being drugged.
I have had the almost fainting in a shop, the absence of any blood pressure worth a mention (about 80/60 I think last time they took it) and the wetting myself randomly (only a bit - but still, it was a warning I think)
I'm also getting a lot of BH contractions already
but seriously, compared to the first trimester, this one is like being in heaven. I am NEVER going to get pregnant ever again!!!!!