eating while suffering morning sickness

Caroline
Morning ladies
This is my second pregnancy and I'm 9 weeks pregnant. I can honestly say so far I am not enjoying the experience this time round
I have nausea/ sickness all day long and feel that I am living off toast and butter, and fizzy juice. My first pregnancy was great I ate a great varied diet as normal and continued to exercise. But it's the total opposite this time, I barely move cos I have no energy and my diet is ridiculous but it's all I can seem stomach
Anyone in a similar situation that can give me any advice xxx