Vitamin b and unisom for nausea?

Nicole
This is my 2nd pregnancy and I have been really nauseous 24/7 this time. The Dr. Told me to take vitamin B6 in the morning and unisom at night. Has anyone else tried this before? I am hesitant because the B6 says not intended for pregnant or nursing women. And also curious if this will actually work. Thank you so much!