Jovia,
I also have itchy tummy. In fact, I had a very terribly itch and rashes on my tummy and bum during week 18 to 21. It stopped after I took some medicine. It was very terrible, cos could not sleep and the whole tummy got red bumps. Now it has started again (since week 27). Understand what you meant by the itch is killing you. I find that cold bath helps with the itch, only for a while though, but better than nothing. Another thing is try not to scratch cos the more you scratch, the more itchy (easier said than done).
Twinsmom, don't worry about your weight. I also did not put on weight when I was in my 14th week. Only started to put on weight from 16th week onwards when my appetite increased. ya, I also took eggs, one a day, think it helps. Dr Loh said it does not matter cos the babies "can look after themselves"!