Fiona - that's me all over!
I suggest that you begin to graze, trying to eat B4 the body requires energy. My go-to snacks are: mixed fruits/nuts; bananas; cream crackers; ginger biscuits; chicken curry with rice; pancakes - mix can be kept in the fridge for a couple of day ready to use immediately 1 feels hungry, even if it's not a meal time. Important to listen to my body!
Anti-anxiety for easing panics etc.
Anti-depressant if 1 is depressed: not low, but can't get out of bed depressed. Some can ease anxiety.
My GP gave me Valium many years ago on an 'as necessary' basis - the evening prior to an event that I was unable to get out of
I also had Propranolol every night which really did help ease those early morning anxiety surges
Let us know how you get on.