Oh dear FAB - what a bummer. I know how you feel when you are expecting a fall and you get nothing. 
The only suggestion I would make is to keep a food diary of everything that passed your lips for a few days. Either you are eating small things without thinking about it (I do this) or you aren't eating enough.
Sounds like you aren't retaining water though if your hydration is down. How are you feeling at the moment? Did you get your blood test done?
Alibaba - I put on weight when I stopped bf too. I never lost any whilst I was doing it, as they say you will.
Can't believe your baby boy is weaning age already either.
PA - Cambodia - wow! That would be quite some lifestyle change but what an adventure!! Would it be just you and your DH going? I hope you get the interview rearranged quickly. It isn't fun to get all geared up for things and then have to cancel.
I had an OK day yesterday after all. I had breakfast but didn't have any lunch as I ran out of time with rushing around and then didn't feel hungry. I did have a slice of birthday cake at 4.30ish and then we went out for a pizza for tea - DS's choice. I left a smidgen of pizza as I had had enough. It was Pizza Express and they do tiny taster puddings with a cup of coffee so I had a decaf coffee and a mini lemon meringue which was gone in 3 bits but was just enough. I don't often have space for a whole pudding though so actually it might have done me a disservice because I have had a coffee and 3 bits of meringue more than I ususally would. No matter. I am not going to fret over it. It was good. The boys behaved themselves for a change and we had a nice time.
Do feel like I am off to an interview this afternoon though - it will 3 against 1 and I am a bit scared. I know DH will not be happy if we don't get the result we want but I am worried about getting side lined if they gang up on me. I reckon 2 of them will.
I have to stay calm. If I get upset and cry that won't be much good and if I get angry I also cry, don't ask me why 
Thanks for the offer of help PA. I may be in touch if it all goes pear shaped. The next step will be to see the head teacher if we don't have a plan today.