As you know from my previous post, I have had this same problem. One time, the doctor pulled it out but, as you say, thought nothing of it. It may be partly attributable to GERD but I feel there is a spot somewhere in there where mucous collects and doesn’t drain properly. After the mucous gets stuck there for a while it forms a scab and becomes infected. If I don’t “hack it up” regularly, it really becomes infected and I have to take an antibiotic. I know this sounds gross, but hacking it up sometimes is really difficult. Wish I could find a doctor that could/would fix this. Had an MRI of my sinuses but they could not find anything – I think that is because it is just a little “dent” or “ledge” back there that collects mucous and doesn’t drain and they cannot see it in an MRI. Let us know how you are doing with this. Good luck!