Hi good morning, So you are suffering from dry cough for more than a month now. You are also saying that you have weakness.  Cough for anything more than 3 weeks should be evaluated to rule out any serious problems. I will require to talk with you to suggest what test needs to be done to find out the cause of your problem. This will help us to treat you properly. Thanks.

Sir, its better you consult a physician/pulmonologist for cough.

Are you having fever or breathlessness, any pain in the throat while talking or swallowing food?

It's dry cough needs proper medication.

It could be allergic bronchitis associated with reflux