Just don't know what to do 😭

Ash
This is my 1st pregnancy and I'm horribly sick. I went to the ER last night because I can't keep drinks or food down. They only did IV and meds for nausea, told me I have GERD and that was it. But I'm more so concerned about the baby. I forced myself to drink a powerade so I will not be dehydrated anymore but I'm paying for that as I'm typing this message. My first appointment is Friday but I'm just soo sad, worried and confused. Has anyone of you been sick like this? If so, how did you get through it?