When I had brown urine I went 2 the ER and found out I had passed a kidney stone..but I had blood clots in it as well. I would most certainly talk 2 my doctor about it, because it could b multiple things.
If there is plenty of urine and it's Coca-Cola brown, it could be hepatitis. See your doctor, sweetheart. Call and tell them the problem and see when they can get you in, I'll bet it's pretty fast.
You're severely dehydrated. Consider going to the hospital along with drinking 64 oz of water MINIMUM a day. I'd start with 32oz tonight within the next two hours.