Help - Metabolism Question!

Hello all!

My metabolism is miraculously slow due to some, less then smart techniques used to loose weight previously, so I can't help but thinking that with such a slow metabolism it can't possibly burn as much as the burn meter says if I take into account my previous stupidities so I would really like to know if there was an x amount of calories that no metabolism can go under.

i.e.  Your metabolism will never drop below 1000.

I would appreciate your feedback so much!!