Help! Should I go to the ER?

Natasha
I'm 16 weeks pregnant and I've had really bad morning sickness since week 4. 
I'm in the national guard and im three hours away from home and staying at my armory for the drill weekend. Everyone is in the field and im doing other training so I'm by myself. 
Today I drank a couple of bottles of water. This morning I threw up before anything was in my stomach and I threw up at the end of my work day. I've been in and out of heat all day. When I got back to the armory I had such a bad migraine and I felt so weak that I brought my bags to where I was sleeping and just laid on the floor. I didn't undress or change. I didn't set up my Cot.
It's been about an hour now and I don't want to move or do anything. I can't fathom exerting any energy. My mom thinks I should go to the er. I'm not sure. I tried to call my ob and my family doctor. Both offices are closed.