Nausea like it's nobody's business!

I'm about 5 1/2 weeks and starting this morning I have had such bad nausea. It has been off and on all day! I'm hungry, yet have to choke down food because even the thought of chewing makes me feel sick! This is so frustrating! Anybody else having this problem? Any tips on how to feel better? I'm thinking of trying a smoothie for breakfast tomorrow to see if that will be easy on my tummy yet filling.