So, I haven't been diagnosed with it, or what not yet. But, I read somewhere, on a symptom's site that having trouble breathing whilst awake may be part of sleep apnea. I'm not so sure, and when I'm awake and what not my chest is extremely tense, and 'heavy', almost as if someone is sitting upon it. My breathing patterns are sporadic, like sometimes I feel as if I don't need to breathe, and I won't notice(yet notice at the same time), and continue to breathe.