Losing weight, feeling so sick?

I'm 30 weeks, and had horrible sickness w/this one and my first. There's at least 2 different prescriptions that I know of that your dr can give you that are safe during pregnancy. Phenergan (dont know if i spelled that right) and Zofran. I've had both and both helped, the only difference between the 2 that I noticed was the phenergan makes you super sleepy in addition to already being exhausted from the pregnancy. Zofran didn't make me sleepy and help me to at least hold down some food. Hope it helps!