You asked in a science section, so I'll give you science answers.
> to every acting force, there is an equal and opposite force. This means the net force in our universe is 0.
This does not describe any known law of physics. There is some possibility that the net energy of the universe is zero. Alan Guth, author of inflationary cosmology, says if this is true, the universe could have formed from a quantum singularity in the vacuum. He calls it the ultimate free lunch.
> This means our universe was created out of nothing and could return to nothing in infinite years to come.
No, it doesn't imply that. But if the cosmological denisity parameter, Omega, is greater than one, then the big bang could eventually result in the big crunch, with the universe 'ending' in a gravitational collapse. However, most cosmologists now think Omega is less than 1. That would make the ultimate fate of the universe a heat death.
> it is possible a countless number of big bangs have occured and with each, the possibility of a planet, earth like ours.
True, but we have no evidence that it happened.
> the exact genetic make up us mine
Someone with genetics identical to yours would be, at most, an identical twin. We don't need cosmic coincidence or parallel universes. We can observe identical twins directly. They are different people.
> Taking probabilities into consideration, ones we die, we cease to serve time again.
I have no idea what you mean by this.
In summary, there has never been any credible evidence for any kind of life after death.