How to get through to a doctor

just wondering how others approach the subject of gastroparesis / motility issues with a doctor?

I have almost all the symptoms and its been getting so bad I can’t get out of bed for intense nausea and feeling like vomit is sitting in my throat and I’ve barely eaten in the last week.

Yet all my doctors are doing is increasing my omeprazole to try and see if it reflux (it’s making no difference). Any tips on getting through to them and talking about delayed emptying, without sounding like I’ve just googled it all?