Is our fate actually determined for us?

This might be a hard concept to describe over the internet... but is fate real? Scientists keep looking for this "God Particle" that hypothetically set everything in motion. They're so determined to find it, that, even though they haven't found any hard evidence of it yet, they aren't giving up, which means they have a strong feeling it's true. And the Big Bang Theory... there actually is a lot of support for it. So if these things are actually true, then everything must be mathematically predicted, right? An explosion lead to the creation of the universe in a logical way. If we can trace the origin of a light wave back billions of years using math, and we can predict its path going forward using math, then can't we predict it's path going forward from billions of years ago? After all, when you flip a coin, you have a 50% 'chance' of getting heads. However, after you flipped the coin and know what the result is, you know for a fact that there WAS a 100% chance of it landing on what it landed on, because every motion in that coin toss obeyed the laws of physics, which obeys the laws of math. If everything leading to the creation of life can be explained using math: all of the trajectories of particles, quantity of chemicals, energies associated with them, etc. then why would math and logic end at the start of life? We believe in personal freedoms such as freewill, but when you take a drug, it clearly affects your mind and causes you to act differently than when you are sober. If you take a computer and damage its hardware, then it isn't going to act the same - just like a person. If all this is true, then that means everything that will ever happen - including you reading this - was determined at the start of time. Also, there's no such thing as "random" in computer programming, because there's nothing in the physical world that is "random" to base a script from. So my question is - do you believe any of this idea? It's really just a bunch of random thoughts, so feel free to comment how you like, but no religious BS answers please.