Need help expanding on theory (lengthy but worth it)?

When looking at the odds of my existence, I take make factors into account. My favorite analogy of the universe coming about is that it is as if a tornado went through a junk yard of plane parts, and when it ceased, a well functioning plane resulted. It also takes many factors for a planet to be able to sustain life, so our earth sustaining life is improbable also. Looking at my existence individually, I note that each ejaculation has more sperm then amount of people on the earth. So the fact that my ancestors sperm beat out billions, in that one ejaculation it took to conceive them alone, and I did the same, we can see that it is highly unlikely for me to be here right now. Considering all of these variables, let's say my existence is infinity to one, because it is sooooo close to zero. I know that I exist, you may not, but I do. I think therefor I am. My brother always says, "what is truth? I am truth." Let's say time and space are absolute and in fact infinite. Then every possibility will eventually get played out. Including me existing an infinite amount of times, with an infinite amount of changes, and an infinite amount of times with even no change to the life I am living now. The probability of me existing in this case is 100 percent. It is a mathematical guarantee that I exist, and will continue to exist and have existed. So looking at odds, it would make sense to side with the infinite time theory, that proves that I am existing right now as a result of guarantee and not a random chance, a mathematical error. Also painting a picture, I think, based on this, about how all of the suffering I have done, and will ever do, accumulates so that I suffer for an infinite amount of time. Because, I'll exist an infinite amount of times and suffer an infinite amount of times. I will also be happy an infinite amount of times, too. This theory is similar to eternal return but instead of my life having now change, I will have an infinite amount of times that do change, though eternal return still applies because I will live this same life an infinite amount of times. I told all of this to my friend who said that in thirty billion years all matter will decay, proving this theory wrong. I just assumed that eventually a new big bang will occur, everything will occur again. But could the big bang occur with decayed matter, could the universe form again given an infinite amount of time and space? The big bang is based on time being relative, or so I've read, so it may not even have to do with anything based on my theory using absolute time. Anyway, I'm not very good when it comes to science, could anybody tell me if this theory has potential, or if science like my friend thinks eliminates it from being plausible. If anyone could help expand on this theory, I would appreciate it as well.