I had lung cancer, stage 3, two years with good cat scans so far.. I know there is a lot of scar tissue, ive been treated for allergy an congestion last 3 months, I do have esophageal spasms a few times a week now,, am nervous its more then that, last pet scan showed fluid around my sinus, with congestion an cough . no infection noted, mucus very thick, every time I bring this up im told its been a bad year for allergy s . as a cancer pt am im worrying too much?