Any tips?

So I am 9 weeks pregnant and the nausea has been constant since the beginning. But now for the past few days I haven't been able to keep food down. Or I am fine after eating until I drink some cold water (which usually everyone says that water will help with cramps and nausea and everything)....but as soon as I drink water, everything comes up...baby just doesn't seem to like it....im terrified about becoming dehydrated or just not having enough nutrients for baby to thrive. So do any of you wonderful ladies have tips on how to cope and be able to eat and actually drink water and stuff?