Every once in awhile when i breathe deep i feel like having a coughing fit and it feels like i have something caught in my throat. what could it be?

Possibilities....: The sensation of needing to cough when you breathe deeply could be due to bronchospasm or inflammation in your airways. It could also be due to atelectasis, a collapse of airways when you don't take deep breaths and then when you take a deep breath, these airways open and can create a cough. If your symptoms increase in frequency or intensity, see your doctor.