For starts,
If you have rocksalt that's the best or else normal salt,dry fry them and tie them into a poultice,apply this poultice over your chest n the corresponding area in the back
Mix crushed small onions,ginger,
sugar Andy,lemon juice together n have a TSP of them in intervals of 15 min
Next Steps
drink warm water after every meal,avoid anything oily ,greasy n sweet,gargle before you sleep.
steam compulsory but never through your mouth
Health Tips
these are just home remedies which work in the very initial stage but if they dont then we will need medicines n a particular Pranayama will help your breathing get back on track