Can't even keep down water..

I'm 11w2d today and I can't even keep water down. I woke up at 4am with a pretty bad headache, drank some water, and was able to go back to sleep. When I got up I tried to drink some water and the second I took a sip I had to go throw up! I tend to throw up with migraines and while the puking has brought my headache back, it's really not that bad. After I felt my stomach had calmed down I tried some small sips and a few peanut butter crackers. I know my headache is more than likely dehydration related so I sipped more water but just about a cup. I got up to go to the bathroom and by the time I tried to sit down again the prepuke salivating had started and then I ended up losing my water and my crackers. This is actually the first day I've thrown up at all and my nausea has been gone most days for a while!