I am nervous and shaky and have an itchy skin rash that has little blisters. headache and general malais. what could this be?

Please see your MD: There are a range of possibilities with the symptoms you are describing. I am concerned about possibilities ranging from eczema to shingles, but can't give you a diagnosis without an examination. It sounds like you need to see your dermatologist asap. I hope you feel better.

Sx's: This can't be diagnosed with the information that is available. A history, physical examination & other studies may be needed to determine cause/causes. Once accurately assessed a treatment plan can be developed.