Okay awesome.

She can help you. Bhooma lives in India so her timezone is different, she probably hasn't seen it yet.
I agree with Kel, caring is nice but we also need knowledgeable. It concerns me that Buttons has a lot of health issues that he doesn't seem to be explaining to you. At least from the sound of it. And that he was/is unconcerned about his nausea. You want someone who's familiar with common feline diabetic ailments - pancreatitis, teeth issues, ketones, etc. You're not going to find an expert unfortunately, but at least someone who won't push issues to the side and say "wait a couple days".
I know you're not very tech-savvy James but can we get you to set up your signature? Only takes a moment and you won't have to bother with it again.
Here's an example of what I had (before my little girl passed):
Panic and Elizabeth | dx 3/28/19 | Lantus TR | Fancy Feast Classics | ReliOn Prime
This is my and kitty's name, then diabetes diagnose date, the insulin she is on, the food she eats, and the meter we use.
If Panic had health issues other than diabetes we would list that too. So for yours could you fill this out:
James and Buttons | dx (diagnose date) | Prozinc | (food brand) | (meter brand) | Teeth issues
At the end I would list any other illness or disease he has, such as the teeth or the tumor if you have a name for it. That way everyone can look at your signature quickly and not have to ask you what insulin or food he's on, etc. At the top right, right beside the Inbox you clicked for Bhooma's message, click James kelch and then click Signature. Type it in there and click save.