Are sleep paralysis, the thyroid, and charlie horses related?

I used to get charlie horses and sleep paralysis all of the time. Then I was diagnosed w/ a hypoactive thyroid and started taking meds. I havent gotten it since until last night. This time just sleep paralysis not the charlie horse. I started talking to some people and asked if they've ever experienced sleep paralysis and someone said yes, in conjunction with charlie horses. Are sleep paralysis, the thyroid, and charlie horses related?