SLOWLY RISING CEA

I feel a little guilty writing because I have done so well and so many have not. I was diagnosed with stage II colon cancer 18 months ago...surgery, no chemo; close f/u. At diagnosis, my CEA was 7.5. It returned to normal, 1.5 within 6 weeks.My last 3 levels have been 2.4; 2.8; 3.2. (taken evey 3 months) I agreed to hold off a scan until next appt. My last scan, 9 mos ago was clean. Right decision? Sign of recurrence?
Thanks. Prayer for all.
Cathleen Mary