hi i am a XXXXXX. for the last four days i am encountering a severe but not frequent cough. what i mean when i cough i cough so intensely that i cannot control it and after i have headaches . i took some cough syrup , but looks like is not working. and honestly i am a smoker, i still smoke but i try to control it. is there anything very effective that can stop it? and is this a noemal virus in this time od the year, or is something serious? thanks for your time.