I have zero appetite

I'm in my first trimester, 6 weeks and I can't eat anything really. I eat once, maybe two times a day when I'm hungry but other than that, nothing. 
I don't have morning sickness, just really bad nausea and every food I think of sounds disgusting. 
Did anyone else go through this? And did you do anything to help it? I feel like I'm not getting enough calories to supply what I need to for my baby.