Can't keep anything down. TMI

I'm 19 weeks 4 days and I can't keep anything down. I'm so thirsty but everytime I drink I have to go straight to the bathroom then it just comes out both ends. This has been going on for about 6 hours. I've never had an issue with nasuea or vomiting before during this pregnancy. It's 3 am here or I'd call the doc. Help I'm miserable what should I do?