Will it ever go away?

I have had the most annoying cough ever for over a week now. And of course there is nothing for me to take. I am allowed to take plain Robitussin which is for chest congestion and makes the coughing worse. It is in theory supposed to make it better but it hasn't! So I have been on the couch for the past two nights coughing up my lungs and not getting too much sleep. Energy wise I am ok but really how long is this going to go on?! We have Caleb, Adrianne and Baby Ben coming for a visit and I don't want to scare him with my hacking =( I am very hopeful that it will go away soon - it is good to stay positive ;)