Breathing problem. Wht happen to me.

I have been faced breathing problem two times in last 14 days...I became helpless at dat time..I felt like I would die with in few minutes..don't know wht happen to me.. actually I have suffering from pain on my back of neck due to lots of sitting in front of computer..so I went to orthopedic doctor few days back he told me that  breathing problem arise from this pain..so he gave medicine for that n suggest me some excrsise.. But I don't feel like I got my answer from such doctr for this problm.. Don't know what happen to me..I m nervous coz breathing problem is one of big issue u can't do much at dat time . Pls guide me and suggest some specialist doctr in South Delhi. So dat I can live freely