Will there be times of ups and downs? You betcha, every one has them. When the times are down I can only look at it and say yup I messed up time to move on. Learn from the mistake and make an improvement. Multiple mistakes does not mean that you fail it just means you have not found the right path yet. For example WD-40 the household product that I think everyone has in there house.
Norman Larsen who invented the product was a self taught chemist. First off that would be terrifying if you mixed something wrong. So Norman was the founder of the Rocket Chemical Company. He was asked to create a product that would help rust forming on the outside of the Atlas rockets. It was his 40th attempt at the product to get it right. A small setback is not something to worry about because you can turn yourself around. I feel bad for the guy who invented 409 cleaning agent. I don't think is how it got its name.