Have been generally feeling tired on and off for a couple of weeks due to heavy workload at uni and being a bit run down. Got a cough this weekend and only had it for two days but tonight I am getting a stabbing pain between my breasts when I cough and there is a dull ache there the rest of the time, which spreads to my ribs. The cough feels mucusy in my throat but I m not actually coughing anything up. Is there anything I can take? it is worse when lying down, making sleep hard