Medical jitters.

Hi, So after an initial letter telling me the DWP would be asking for more information from my health professionals I today received a letter informing me of a face to face medical.
To say I'm panicking is a huge understatement. I suffer not just from mobility issues but going out causes me great emotional pain. I need to follow my own set routine. I don't go out, I find going to unfamiliar places harrowing and the thought of someone examining me... I understand a home visit could be arranged but that has its own terrors. I'm in such a bad place I'm terrified. No one understands the thought process that gets me through a single day. Pain, depression and panic are impossible to control. I just need a,...I dont even now what i need. Sorry.