Like you, I have all day nausea but have never actually been sick. This is my second pregnancy and with my first, although I felt sick, it was not this bad. I can barely get out of bed because, as soon as I get up and start moving around, I feel like I'm going to collapse. Haven't eaten properly for a week (mainly just constant snacking), which I know doesn't help but it's so difficult.
I am wearing sea bands and have a stash of breadsticks and ginger biscuits next to me. It does help a bit to munch on one of those when the nausea grips me but I felt best yesterday when my husband forced me to have a bit of pasta to eat. I didn't feel nauseous for a couple of hours after that, what a relief!
Last time, the bulk of my nausea lasted 18 days only, so I am praying for relief soon. When you feel like this, you feel like it's never going to end and you can't possibly go on but, I know from last time, that it soon becomes a distant memory.