Morning sickness and the blues

You guys my husband and I are expecting our first bundle of joy and even though this is a joyous occasion, right now I'm physically not feeling it. I'm 8 weeks pregnant and The morning sickness is constant and it's causing me to be a little depressed. I want to spend all day in bed and I can't seem to get it together sometimes. My husband has been very supportive but I don't want to scare him and put him down in the slumps with me either. Please someone tell me it gets better? Tips are highly appreciated for this nausea. My mom tells me that saltine crackers and coke help and they have but I don't want to consume a lot of caffeine. Help!