I was on the pills for about 6 weeks and then weaned myself off them slowly with a few lapses! I tried some hideous ones in the beginning that you place on your gums to dissolve - can't remember the name of them but they were grim. Made me feel worse. Then I got some cyclizine after going into hospital which were great. I didn't realise how good they were until I ran out once!
It's awful that you need to be so persistant about going into hospital. It made me feel so much better because dehydration makes you feel sick ironically so it's a vicious circle.
I really hope you feel better soon. The great thing about it is as soon as you give birth all the funny sickness and smells disappear straight away. And of course you have other things to concentrate on! I must say it does put me off having no. 2 as I can't see myself coping with a baby and having the sickness 
Karen