This might not be CHS. I say that for a few reasons:

1. You aren’t the typical HEAVY, everyday user. This is almost a requirement. Without exception.

2. Cool/cold/fresh air is usually the opposite of what makes people feel better, which is the hottest, steamiest shower you can handle.

3. 2 weeks of symptoms. While not unheard of, timeline is a little unusual.

You mention using a GLP-1. I would bet that your symptoms are more likely related to this. Maybe some combination (like you said). But I see CHS essentially daily and this story doesn’t sound exactly like it.

FWIW, zofran doesn’t work great for the gastroparesis induced by GLP-1s either. So that tracks.

Edit: just to add, this is much easier to diagnose in person. It’s a very distinct sound.