Hey I had my surgery about a week before you, and I just went to Dr today. I have sinus crap, so I thought. I called to see what I could take, and it was recommened that I come in to see the Dr (my family Dr), because even though I am back at work, your immune system may not be strong enough to fight off the crap thats out there right now. The only thing I was told I could take OTC is Tylenol Cold and in my family Dr's words... that stuff isn't gona help you much anyway. So I went in and I am glad I did, I have a large amount of congestion (that isnt even causing me to cough), a sinus infection, and an ear infection in each ear. I have only had symptoms for 2 days! So I was prescribed an antibiotic that is "easy on the stomach" and told to get some mucinex D (it is behind the pharmacy counter and ok to take) and sugar free cough drops. I just picked up my prescriptions to we shall see,. But your immune system is still week, so dont try to fight it.... could make it worse!