Active tuba player.i got sick and stop music or any activity.my anxiety attacks i feel faint can this be because of sudden change in breathing tech?

Baby step back: We all struggle w/change, especially if it is a temp. Loss like your tuba playing. Anxiety and a feeling of shortness of breath can go hand in hand. Create a schedule of practice, increasing it a few minutes each day. A clinical psychologist can teach you some stress management techniques. You sound like a very dedicated and self-disciplined guy and, while usually good, can work against us.

GET HELP: Not reasonable to suffer anxiety attacks alone. Tuba playing not known to cause anxiety in the musician. Have dr. Check you out with possibility of psych consult.