Throwing up past the episodes?

I’ve been suffering with CHS for around 9 days now. I’ve been taking zofran once a day now, along with pepcid at night and morning. I’ve seemed to be doing fine with this, but I threw up 3 days ago, went to the doctor to find out I’m okay, and then was fine again. I just threw up again. I suddenly get a really bad head cold and can’t concentrate when I try to distract myself thinking it’s anxiety, so I go downstairs, lightheaded and cold, and then it just comes out. There doesn’t seem to be anything wrong with my vomit, mainly liquid. I don’t know if I might be eating too fast or something, but I still feel like something is terribly wrong with me and it isn’t just CHS. I’m so worried and scared.

I’ve been coughing again recently and my heart rate has been really high. I’ve been getting dizzy. There ends up being this pain in my lower abdomen that’s sharp and I take tylenol and feel better. I feel like I’m going to die still. My skin has been getting itchy, I’ve been getting tingles and numbness in certain limbs, and have been dizzy trying to sleep. I know I’m not drinking enough water but I’m trying to. Same with eating, but I felt good enough to not be as worried about it as I was the entirety of last week, but I guess maybe not. I feel so terrible. Is it really just CHS?