Very dark urine?

Liz • Baby #2 due 12/24!
When I go to the bathroom my urine is very dark, almost like a golden color and when I wipe it looks orangish, hopefully that makes sense. I am pretty sure I am dehydrated (I get about 20oz a day) since I haven't been able to keep fluid or food down. Could this be from anything else? I'm 11 weeks on Thursday :-)