Dizzy when standing, and other strange symptoms, could this be low blood pressure?
So for the past few days:
-Whenever I stand up, usually after sitting awhile at home, my vision will go almost black for a second, then back to normal.
-My head will then buzz, I'll feel dizzy, but it will stop after a few seconds.
-My stomach and chest area have felt strange, like getting butterflies, but not a stomach flu sort of feeling... don't know exactly how to describe it.
-When I'm walking for awhile, like today and yesterday home from school, my legs will tingle a bit when I step on them
-Also, when walking, do you know the feeling of when you spin really fast in place, and the blood rushes to your fingertips? Well, when my hands go back and forth when walking, it feels as if the blood rushes heavily to my fingertips, in pulsations, sort of.
My friend suggested it may be low blood pressure. Most likely it is, but I'm not entirely sure. These things have never happened all at once before, and I also don't feel ill. Does anybody know what these symptoms could mean?