IMO

Maybe What seemed like hardly anything to B, was alot for you.

~~
Well,
I can draw energy not just from people, but from animals also.
Soo it could be that.
Or
When you opened yourself up, you could have drawn on the energy of the "area" or spirits,
People have been aroud here for many, many, generations.

But it could have been somthing else. Just guessing. It could have been alot of things.