Hi Dave! Try not to worry too much. The same saying still applies, if a sore has been there for 2 weeks then its time to get it checked by a professional. Keep yourself busy so you dont worry too much about it. There are many different things that can go wrong inside your mouth.

About your cold or flu symptoms, sometimes something that appears to be a little problem can knock you on your butt. After everything you have been thru, your resistance is bound to be at least a little lower than what it would usually be. That would make you more susceptible to picking things up and a bug hanging around with you longer than it would someone else. Recovery from OC can take a couple years and even after that many of us have some late after effects.

Hope everything turns out to be ok and you begin to feel better very soon.