Hi GRL
I think it's normal to think of the worst case scenario when you've suffered from anxiety. Whilst you're waiting for your appointment, you could try and heal your nervous system with meditation, good sleep...if possible, getting out in the sun....if possible!, eating regularly to keep your blood sugar levels even, taking a good quality Vit B & omega 3,6,9 supplement and drinking lots of water.
None of these are miracles but will all help with the getting over what you've been going through. Also wanted to give you some support. I know from personal experience that it's often not possible to see past it when your in it.
Take care.