The more I prepare, the possibility I will stutter.

The more I prepare, the possibility I will stutter. I know, it contradicts with what the strategy should be. In my case, I would let the brain flows whatever it wanted to spill. According to my presentation experiences, the harder I practice, the more chance I would messed up during presentations. I think is due to my overthinking habits minute before presenting. I would often change the words that fitted my ability, etc without sticking to the original ones. Anyhow, I have an interview tomorrow, I hope I can get through this! Please share any similar thoughts on this. Thank you