I have the same problem which is why I’m hesitant to stop medications. Did chemo because oncotype positive. Tumor marker dropped about 20 points (needed to drop 50 to hit high normal), then after 3 months started back up again almost to start level. At that point, he ordered brain MRI and pet scan. Neither of which showed new tumor growth. Then it dropped back to where it was before, then another 10 points and that’s where I sit. He said it can happen and as long as stays stable, monitor but not considered a problem. Easy to say but sits in your mind that maybe there’s a reason. And yes, I’ve read multiple articles about tumor marker specificity and that some feel they’re worthless but my doctor still uses them for monitoring and I have to feel he knows what he’s doing. I’ll look into the Pectasol (haven’t heard about that before), already researching other naturals like mushrooms.