At what point should I be concerned?

So I'm 8 weeks pregnant and the nausea has me down on my knees (literally). I have vomited all day today, I can't even drink water or eat crackers and up it comes within an hour.

At what point should I be concerned? I realize vomiting dehydrates you so I'm just wondering what I can do to at least keep myself hydrated. I realize I'm not going to wither away to nothing I've got plenty of meat on my bones 😂

I have been taking pills for motion sickness and nausea, ginger ale, breads and crackers, tea like this is my third pregnancy I've done everything I've ever known to help even a little.

Unisom too! It helps a little but not enough and I can only take it in the evening. I can't even choke my prenatals down.

HAAALP 😭