Detailed history given by you.
Good job.
Cough is a reflex by body to expend phelgm.
If phelgm isnt coming out then it means.
She is dehydrated, the phelgm is too thick to move out, there is some underlying infection which is causing body to produce phelgm.
When it comes to chest pain. I urge to click on consult now and talk to me or any other professional. Since chest is a cause for immediate concern.
For any further questions you can consult with me on Practo
Next Steps
Hydrate sufficiently, but i would want to know if she has an echo report to be sure how much she should drink
Syp mucolite will help thrice a day
Health Tips
Hopefully your mother feels well
Stay safe