WTOM,
Great news that you have, in general been doing so well!
From the stressful situation and lack of sleep you describe...it's not surprising that today was a challenge. Sometimes situational (or even unexplained breakthrough) anxiety just gets the best our management efforts and tools.
Do you believe that your muscle pain is your anxiety manifesting itself physically? If so, then I think you did just the right thing in taking your benzo...just as you did, as a rescue med for an acute anxiety episode.
If you continue to go back to doing well, with only the occasional rough day...then I don't see why you couldn't continue at your current level (with your doc's approval) and just use your Loraz if/when needed.
I hope that tomorrow is an easier day all around! You are doing great! Keep us posted, so we can keep you in support.
S.C.