Regarding blacking out while standing: perhaps you have what is known as Postural Tachycardia Syndrome, or POTS. There was an article about POTS in the New York Times Magazine this month, here it is:

http://well.blogs.nytimes.com/2015/0...t-solved/?_r=0

Does the patient in the article sound like you?

I too hope that you will discuss the blacking out with a doctor.