Whether day to day workings are predecided by the supreme power or we are doing as per the situation arises?

We have lost 9months baby before the delivery, now we are confuse whether it had happend as per desire of the almighty or because of our ignorance.These type of happenings put us in dillema about the existence of almighty that why his desires are so negative that creates also bomb blasts,sunami,earth quakes and so on to make hurricane in human life.