Anxiety about how I sleep

Can sleeping a certain way, like distortion, be detrimental to health? I sleep on a pretty small couch and my family tells me that I sleep that way. Like legs and arms all over the place, head distorted, and even scared me a bit when they said that I perhaps am close to suffocating myself sometimes. May even contribute to pain sometimes in my body.
Anybody know if there's any truth to that? I fear sleeping in my own spacious bed because I don't wanna be alone, in general, when sleeping. It feels isolated back there.

bin_tenn said:

It can cause aches and pains, yes. I sleep in a good bed, but I still sleep in funky positions. Not on purpose, I do it while asleep. I often wake up with back pain, neck pain, pulled/strained muscles, etc.

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I see. Usually I can get over the temporary pain but it worries me ever since she said "you looked like you were suffocating." I would just prefer to have it not end up biting me in the butt later.