I also believe there is life hereafter.

But if there was nothing after this, the mere thought of it alone is enough to make me wish I had never existed in the first place. I'm not content believing that life ends at death. I'm not constrained by such thinking either. So no I'm not doing it wrong.

If this was all there is then man's existence in my mind is cruel. To give us a sense of self awareness and then take it away is cruel. If chance alone was responsible for man it would have been better that man did not exist. That's my take on it.

I can see from your view that you may have accepted it. Live life to the fullest. That's all good. For me it just isn't enough.