Hi Jay, in my opinion this is completely related to bfs, so I shouldn't worry too much (I always say that to you

)
In the beginning this was one of the many symptoms that was on my big list.
When lying on my bed my arms began to sleep directly. And every night I woke up with tingling and sleeping limbs.
Nowadays I occasionaly wake up with a sleeping arm. And it occurs when e.g. I cross my legs, sit too long or type too long.
What helped me a lot at that time was wearing arm braces at night.