You don't have actually free will, if by free you mean "uninfluenced by anything".

There's no evidence that such a thing exists, and anyone who claims such a thing invariably appeals to supernatural or hand-wavy explanations.

Note that many thinkers who claim free will exist actually are saying "what most people mean by 'free will' does exist", and usually that means "an agent capable of making choices without outside influence". This idea is compatible with determinism, so these people are called compatibilists.