Hi Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concern.
Severe coughing during the night may be due to many conditions
1.Allergic conditions like Asthma, Hay fever or
allergic reaction from animal dander, dust, cosmetics, or pollen.
2. Lung problem like Acute bronchitis, Chronic
obstructive pulmonary disease (COPD), Pneumonia, tuberculosis ,etc
3.
Upper respiratory infection such as the common cold, influenza , etc
4.It may be symptom of Serious or life-threatening conditions such as Congestive heart failure, Lung cancer,
Pulmonary edema.
As night cough can be due to serious diseases, failure to seek treatment can result in serious complications and permanent damage.
The best way is to do would be to visit a physician, and he would provide you with a specific diagnosis.
Hope your query is solved
Get well soon