[jennyjuniper]

It's awful to feel anxious and panicky, but please see your doctor. If you can't bear the thought of waiting with a lot of other people, ask for a time to see him/her and then go into the waiting room about 5 minutes before your appointment.
A few tips to help are
Spend time in a calm peaceful atmosphere, out in nature is best.
Drink camomile tea, especially at night as it helps you relax and get a good sleep.
The rescue remedy lozenges suggested by Rob also sound like a good idea.
I hope you feel better very soon Jack.