Interesting, I had never thought to make an association of sleeping mechanics as a symptom so to speak.
I have always suffered from insomnia and hyperactive thought process when attempting to fall asleep, which I have associated as 'an additional symptom'.
I sleep under a heavy (non-weighted) blanket in the fetal position, with my head wrapped in a pillow, with my arms around my head holding the pillow in place. I never genuinely considered that this traint could potentially be a symptom. For white noise, in an attempt to block out any background or through-wall noise, I use a Vornado fan set on high. Without it, the slightest noise, including a ticking clock, someone snoring on the otherside of the house, a fish tank filter, conversation, or any persistent noise keeps me from sleeping.