If you throw a pitch early in the game and it doesn’t work, that doesn’t mean it’ll never work. Each pitch is a new event. What happened last pitch has nothing to do with what will happen the next time you throw it. If you feel uncomfortable with a pitch, get out of the inning and then head to the bullpen and work on it.
You wouldn’t try to drive your car with only three wheels would you?
Don’t limit your options for success because a certain pitch requires a little extra work some days. When should you stop trying to use a pitch on any given day? When the game ends, not one second earlier!