WHO AM I ?

It is sometimes worrying me to think who I am. Why is there my existance ? How did I come in this world ? Why for I took birth ? Who needed to bring me on this earth ? Why even this world is here ? And all the goodness & the evils exist, why ? The sun rises & sets, the moon & stars appear & disappear on the sky, what is the reason ? Man lives & dies, weathers come & go, poverty & riches take their turn, why? Why ? Why ??

I get confused. I start thinking. I have been thinking. Appearing before me are a lot of theories to consider. Three major areas happen to crop up among them :

A. Existance of God
B. Non-existance of God
C. Failure or success of Science with regard to the existance or non-existance of God.

I go on thinking & find myself unable to reach a concrete result. Can anybody help me ?

--------Savitree