K.:
Congratulations on your newborn!!
I'm truly sorry you are experiencing these things. The last time I was dehydrated, my tongue was like yours. Please have your husband take you to the ER for an IV drip.
When were you diagnosed with a Hiatal Hernia? That Barium stuff is EEW!!!! Most times, antacids will help. I know, I know, I know...but the other option is surgery. And since the hernia is a bulging from the stomach to the diaphragm into the esophagus, antacids help.
Please ask for help/support from your family and/or church. You need to get sleep. Tell your husband that he needs to step up to the plate and help you so that you can heal and stay healthy.
I don't know what you are using a 50 ounce bottle for. So I don't know how to help you there.
If you are dehydrated, your milk supply will drop significantly. If I lived closer, i would drive up today to help you. Please go to the ER and get an IV drip to get re-hydrated and start healing!!
GOOD LUCK!!