Benefits end date after a layoff after 3 years as an HR coordinator

I was told my coverage ends on my last day, but the letter says the end of the month. I do not usually post, so bear with me. I have an appointment next week. Did coverage match what HR said?

Ask HR to confirm the exact date in writing. I also called the insurance company to double-check.

Dental and vision sometimes end on a different date from medical. Mine did.