vomiting getting worse

I'm 11 weeks and noticed I'm vomiting up more and more frequently as this pregnancy progresses. I started out with no vomiting at all. Then like once a week. Then twice a week. Then once every evening. But now I'm vomiting multiple times a night. I'm hoping that I'm not developing HG like I did with my 6 month old. It will make taking care of him while pregnant so much more difficult to do. I know that vitamin b6 and unisom work great but they also make me angrily sleep walk so I don't want to take them unless it becomes absolutely necessary. I know about the angry sleep walking from my husband's experiences that I have no recollection of. Any remedies other work for any of you?