Anxiety Support Group
Anxiety is a physical condition marked by intense and persistent feelings of distress, fear, angst or dread. General anxiety caused by routine day-to-day stresses usually passes quickly and is experienced by almost everyone at one time or another. However, such feelings that linger over time and are very difficult to cope with, and which lack a clear cause, may indicate...

this seems extremely out of the blue and the only way I know to crash severely so that you can't function at all is to go off your meds cold turkey.
:) all the best! Take care, you'll get through this.
Best wishes. You are not alone.