I just got over a really bad and exhausting acute bronchitis but I noticed that during the 3 weeks when I was sick til now I sometimes need to take deep breath and sometimes I need to breathe through my mouth and I need to get up to feel like I'm actually getting the air to my lungs, plus I sometimes feel this pinch in my chest and my a kind of back pain.

It doesnt really hurt that bad but kind of annoying, so any idea what it could be ?