I personally think that nothing in the world have free will, I am not saying the actions you do aren't yours.
But I tend to think of it this way, if our actions was performed due to chemical signals in our brain and there is no such things as randomness, your DNA changes to the environment, the object of perfect balance on the tip of a single atom was moved because of small air particles, and the moment big bang, or "the start" happened everything is already in place, and everything is already determined by said atoms and such because of where they were at the time. And the atoms becomes stars, planets, life, because they are where they were. Doesn't this means, there was no randomness, and your actions never mattered in the first place, because it was all determined, because the atoms and such, was where they were to begin with to trigger the chain to produce everything we see today?