If a spinal block didn't work before, will it likely not work again in the future?

When I had my first child, I had a spinal block before my c-section. It didn’t completely numb me and so I had to be put under complete anesthesia. I missed the birth of my first baby because of this and want to know if this is likely to happen again when I have another child? I’ve heard of people getting multiple epidurals and being told that if the first one doesn’t work, the second probably won’t either. So, just wondering if the same applies to spinal blocks.