I believe I am currently suffering from dehydration. Help?

I have been experiencing all of the symptoms of dehydration since I woke up this morning. It has been quite awful. I have been drinking water consistently throughout the day, but my dehydration symptoms are not going away. I am not going out tonight because of how terrible this feels. The plan as it stands is to lay here in bed drinking water and trying to fall asleep, but I don’t see that happening soon, as I am extremely uncomfortable as a result of the dehydration. Any other suggestions? Can I expect this to be over when I wake up in the morning?