Should I beg God to save me from the doom ?

You can beg. You do know that very often the answer to prayers is a flat out NO! ?

God don't do requests.

Yes and strive for protection and do good.

Only if it's in your heart to do so..

Nah! We are all going to die. And be reincarnated again. AFTER , we obtain a higher lever of spirituality. and oneness. The GODDESS, the creator of all, has always seen to that.