1. not really and no
2. Nope, pretty standard acne.
3. I've had it as long as I can remember IF I ridiculously over exerted myself or didn't shower. I was able to be fresh for a whole day with just deo, but once I hit 9th grade (age 14) I would get BO from the most standard school day.
I can't smell it for the most part. This is going to sound weird, but in one class I can smell it. I'm positive it's coming from me by the warmth and how local the smell is. If it were coming from elsewhere, I'm sure it'd offend me. And sometimes when I walk out of a classroom I can smell it for a brief second.
Have you heard of bodymint? I've read some reviews and they mostly seem positive, but I'm not sure I how it'll work with people that have bo. I ordered a bottle that should come anyday now, I'll let you know how it goes. I'm 5'8 at ~130 lbs so I'm not overweight or anything.