Breathing fatigue and muscle loss.

Hi! I'm feeling a laboured sensation while breathing especially through mouth.I am able to feel a little gurling or wheezing sound in my chest while this difficult/laboured breathing.Apart from it I'm losing my muscle tone or mass.Sometimes I even feel weird to press or pull my muscle mass easily, which weren't happened before I think.This kind of sensation(wheezing or soundy breathing) feels in chest and abdominal area.Recently I was prescribed for vit-B12 deficiency.So, I'm taking Renerve plus from yesterday till 10 days.Any suggestion on how to resolve this issue as quick as possible? PS:-I recently suffered from acid reflux (as per one medical specialist) from 3-4 weeks.Could it be linked to my current issue or is it anaemia related? Whatever it be doctor, just suggest me some medications, as there were lockdowns going on!.