How far along are you? I am now almost 14 weeks along. I have had terrible morning sickness. The doctor said it would be the worst between 8-12 weeks and that seemed to be true for me. It seems to be getting much better lately.
My doctor gave me a list of things that are and are not safe to take in pregnancy. She lists Emetrol, vitamin B6, and unisom as safe to take for nausea. She lists Tums as safe to take for heartburn. However before you take any of these I would check with YOUR doctor to see if he/she feels the same way!
Eating frequent small amounts seems to help some. Try to avoid unpleasant smells. Also I have found that peppermints, lemon drops, and ginger candy help a little. Avoid greasy foods and those with too much sugar – those set me off the worst! Good luck – I feel for ya.