If I'm feeling anxious about something like an appointment I find it helpful to gather information so I can prepare for it. Here's a link to the Mississippi Medicaid website.

This appears to be the link that is most relevant to your personal situation: Children's Health Insurance Program

If you review the information at the site before you go you might have a better idea of what to expect and this might help minimize your anxiety. Feel free to print pages off, go over them with your husband, highlight relevant points and bring the pages with you to the appointment.

By the way, I agree that the woman who took your call was exceptionally rude.