Checking my last day of health coverage, customer-service rep here

I was told my coverage ends on my last day, but the letter says the end of the month. It has been weighing on me all week. The letter is unclear about dental and vision. What should I do about appointments?

Thanks for writing this out. I went through something close to it 14 months ago, and it got easier once I kept a simple log of every call and form.

Keep everything in writing and save the confirmation numbers. It made the follow-up calls so much easier.