Hydration

How do some of you guys stay hydrated? For 4 days I have been throwing up literally everything that hits my stomach. Water, soup, broth, crackers, everything. I'm 12w5d. I would really like to avoid the hospital as last time I went in for dehydration it was a terrible experience. I have been prescribed three different medications including suppositories and none of them have even come close to touching the nausea. It's all day and all night. I warlike this for five weeks. Then I felt amazing for two weeks. Now it's back worse than ever! All I want is to be able to keep a little water down. Any advice from those that had no relief even with medicine?