Nausea all day long!!!!

I'm 5 weeks 3 days pregnant and for the past 5 days I have been nauseas allllllll day!!!  I can only eat what I feel like eating at the moment because the thought of anything else makes me even more nauseas! Thankfully I haven't vomited yet( I hate to vomit) can anyone please tell me what has worked for them so that maybe I can try😔 I've already tried crackers, water with lemon, smelling lemons! And it doesn't seem to help 😓 thank you !