I am really horrified to see white hairs appearing and I am young! I spotted these a couple of years ago and I was thinking that they were due to stress and I would pick them out with tweezers... I recently noticed more...and it's causing my already bad major depression to a whole new level :'(
I just wish I could pinpoint to exactly what was causing it..... Is there any way to find out?
What you're describing I think is pretty normal. It doesn't necessarily mean you will turn gray overnight.
This seemed like a pretty good article on the topic.
The Most Common Gray Hair Myths Debunked...
http://www.huffingtonpost.com/2014/03/15/gray-hair-myths-_n_4892577.html