hi yes that is normal for the first week ,my breathing was tight. had a back ache too due to sleeping on my back. i am 3 weeks post the saturday just about sleeping on my side now. x
I had tight chest and had to use my inhaler or the first time in years after my BA but wore off after a week or so, backache is a nightmare aswell I had it for weeks from sleeping upright & bad posture! But it gets easier as time gets on xx