Yes, I have all the symptoms. I'm so used to them, they don't bother me. Sighing is actually a good way to let the air out, yawning is probably because you are beat. Back hurts from effort to breath. Your body is trying to make up for the problems you have. Listen to your body and don't try to control it.
A smart move is to learn belly breathing. Let the belly come up and down with each breath. You can put a book on top of your belly to strengthen your belly breathing. Start with a few...inhale belly full, exhale belly tightens.
Take good care of yourself, rest and eat good food. Hope you do ok.