Antheia,

I have not gained that much weight at all either and I managed to loose weight in the first 20 weeks as I was crook with MS too. My OB was not concerned about that at all and said that as long as the bub is measuring well and growing then thats all that matters - I have put on about 7 kgs the whole preg so far and bubs is fine.
As I said my MS didnt let up till 20-ish weeks and now in the mornings I feel crook again too - I dont throw up any more but I still feel sick on and off during the day.
Your not alone!! Please dont worry and if you are at all concerned call your OB or midwife and ask them to see you.

Kate