Breathing problem

Patient: Hi,i m 21yr old boy.from past 6months im suffering from irregular cough and cold followed by chronic breathing problems during sleep for 2-3 days.i have been using salbutamol cough expectorant to get partial relief but it came back again and again , iam afraid if its allergy or m asthmatic.will be pleased to hear from u asap.mrinal mohan ,kolkata, india