Put a different spin on the thought, turn it into a positive. Remind yourself that this is the first step to meeting your baby, it's very common and the risk of any complications are low especially as you've had spinals before. But focus on the positive thoughts of your baby being born - it's just a step to help you achieve that. I had epidurals during both my labours and that was my thought process. Also knowing the pain should subside helped me a lot

Good luck and focus on the outcome.