left hand began to tingle vision got flashy...

Hi, welcome to the ehealth forum and I am glad to help you.
You seem concerned by the numbness, tingling in left hand and left hemiface and pressure and pain behind the right eye.
The symptoms that you have described might be due to Migraine aura involving your vision.Migraine auras include a variety of sensations — often visual, but which also may include other sensations, such as numbness — that precede or accompany a migraine. Aura can sometimes occur without an associated headache.
You can discuss the same with your personal physician and decide the course of management after the confirmation of diagnosis.
Hope this helps. Take care.
Note: This post is not to emphasise final diagnosis as the same cannot be made online and is aimed just to provide medical information and no treatment suggested above be taken without face to face consultation with health care professional.