How long will I feel unwell from fainting?!

How long will I feel unwell from fainting?

I passed out in the shower this morning, came over sweaty, sick and black vision before passing out etc I have felt weak and exhausted all day and after sleeping for most the day still dont feel any better. This has happened 3 times in the last 6 weeks. Any ideas? I have contacted my Dr whi wants to run tests but can't get an appointment to see the Dr till Friday. I still feel so unwell.......

3 weeks ago
Def not pregnant as had a hysterectomy last year...

Is it possible you are pregnant?
It could also be that you have hypotension (low blood pressure) which could cause this. There are just so many possiblities. I would consider calling your dr. back and letting him know how poorly you feel and would like to be seen sooner. If you faint again you may want to go to the emergency room.