OB said everything looks great and I have a ultrasound and Labs next week. I'm hungry and…

OB said everything looks great and I have a ultrasound and Labs next week. I'm hungry and nauseous..I have been drinking ginger ale but still feel nauseous like I gotta vomit but nothing comes up..worst feeling..then I get hungry again. Should I just chew on some ice!? I also have the chills..We keep it between 73-75 in the house but I'm freezing..maybe it's hormones!? I wish My Doc would prescribe Me zofran it helps Me a lot but She prescribed Me unisom and vitamin B-6.