Why do i get coughing spells?

Hard to say: Cough attacks may come from a variety of sources and maladies: asthma, infection ( pneumonia, bronchitis, abcess) post nasal drip, allergy, gastroesophageal reflux. Couldn't be sure about your specific case without more history and a listen.

Possibilities...: Possibilities for a chronic cough include bronchospasm from any etiology, gerd, post-nasal drip or a combination of factors. See your doctor so your cough can be diagnosed and treated.