Excruciating pain

Dropping this question here with hope of some clarity.

Does anybody else experience debilitating cramping that seems to worsen when they lay flat for bed? Sometimes the cramping flares up like a bolt of lightning hitting me in the middle of the night and the pain is so bad that I’m not able to go back to sleep for hours.

It seems like this is a pattern for me (that the pain strikes me out of nowhere during the night.). Curling up in the fetal position helps alleviate the pain somewhat, but barely. It really does seem to feel at its worst when my body is straight up and down. Does anyone else experience this particular phenomenon around cramping in bed? Any advice?