I didn't have 'morning' sickness. I had nauseau that started early afternoon and went on all day, peaking at about dinner time, and it lasted from week 8 until the very last day of each of my pregnancies. I had a girl first and, during my second pregnancy when I had exactly the same symptoms, exactly the same cravings and food intolerances, I was convinced that I was expecting another girl. So I was very surprised (and pleased) to see a little boy being held up in the delivery room. I never vomited but I'm convinced that's only because I have a vomiting phobia and am an expert at not being sick when perhaps I really should be.
Sea-bands are the only things that made any difference at all for me. I felt horrendously guilty over my diet (which for months seemed to be cheese sandwiches, crackers, full sugar coke and the occasional beer). I found the idea of eating fruit, vegetables, juice, meat, fish just as repuslive as tea, coffee and wine. I didn't gain that much weight in either pregnancy but first baby born at 9lb 2oz, second at 8lb 15oz. I remember so clearly the first meal I had after coming out of hospital - it was gorgeous!!!
Good luck to you. Please try the acupressure bands - you can get them in any chemist.