I wouldn't be to concerned at those levels, I would however pay special attention to any symptoms you may notice and I'm sure the PCP will want to keep watch on the levels, esp. if you develop symptoms.
You mentioned the breast cancer forum..do you have a history? If so this could accout for the slight elevation.
Basically, a sed rate, also known as ESR, measures the rate at which red blood cells (RBC's) settle to the bottom of a column of blood in a glass tube. The rate depends on certain proteins in the blood.
Some of the common conditions that can cause an elevation in the sed rate are infections, inflammatory diseases such as RA and lupus, blood cancers and other cancers that may have metastisis to other areas (lungs, breast, kidneys, colon).
The test isn't really specific to one problem...just kind of a pre-diagnostic tool..just tells the Dr. that he may want to watch it for a time.
If you develop some sort of symptoms or the rate continues to climb then I would expect the Dr. to begin additional tests to determine the cause.
LOL..I probably gave way more info than you wanted..the nurse in me..have to teach!
Anyway, I really wouldn't worry, just pay attention to your body.
Wishing you happiness and good health!