Im sorry you are feeling so bad .... you mentioned the pressire on you to get better ... is this pressure coming from yourself or others?
As Melissa said " try and get grounded"

Deep breathing can help alot...

Definatly get in touch with your doctor.

I was intially given Seroquel for the simple reason that I was a basket case and unable to sleep which made me manic...

Have you been on Seroquel very long ? are you on a high dose ?
Have you had this anxiety all day or does your get worse at nitetime?

(((( Hugs))))