Tremors, feeling anxious or nervous, sense of panic, sweating, increased heartbeat, feeling of impending doom, stomach discomfort, dizziness etc are signs of anxiety. These can be debilitating. If the anxiety is overwhelming, consult a Psychiatrist at the earliest. With the right medication and counseling, it is likely your symptoms will improve.

It seems either u had a acute stressful event recently , which was the cause of these symptoms or could have happened out of the blue . Panic attacks are very unpleasant and scares u to death .