Number I know that feeling so well.
People and their unfounded theories. I actually read somewhere that lemon in water was very good in pregnancy as it helps with not only constipation but provides a regular source of vitamin C which body does not store.
Re jeans - over bump/under since I have no experience I will try both on and see which is more comfy. That said I am wearing my tights under my mini bump today and it feels very comfy.
I am going to buy a few more dresses for work. Not sure I can bother with skirts and trousers. I do have an Isabella Oliver skirt which I will wear more now, can be worn below or over bump, assuming that it still fits.
I wish I could treat myself to some of their maternity dresses, but really trying to learn to be more financially responsible now I am going to be responsible for another human being for the next [21 years] 
I had a bit of a situation yesterday with my trousers, since I get changed in the gym for work. The trousers I packed could only zip half way. So I went around with my top tucked out and half zipped trousers all day
. I now to have to try the outfits before I lazily dump in my gym bag. Joys of pregnancy 