I am not a doc nor have I ever studied anything medical other than my own and my family’s care so I’m afraid I am one of the most limited sources of information available. Getting in to a clinic should definitely be a top priority. My other suggestion is drinking, not eating. Pedialite is, I suspect, least likely to trigger more trouble but when you are sick, least likely is still not unlikely, I'm afraid. I say this based on a little bit of reading about why they made their product the way they do... I would also recommend that you drink it slowly.
Test OFTEN - it's the only way you're likely to know how your sugars are doing. Can you have someone else drive you, I hope???
They have a couple of medical options to get you to keep things down at the clinic and if you are as dehydrated as I suspect you will be, I think you can expect them to pop an IV on you for a bit, also.
I wish you all the best and I hope you post back soon to let us know how you are doing!