Answer:
I am heavy forward, but backward I'm not. What am I?
I am a red drum which sounds without being touched, and grows silent, when touched. What am I?
I belong to you but others use me more often than you do. What am I?
I am the building with the most number of stories.
Marking mortal privation when firmly in place. An enduring summation inscribed in my face.
No matter how little or how much you use me, you change me every month.