I am sorry you are going through that. I didn't know what CFS was until I looked it up. Have you had the CT scan? That picks up most leaks from what I was reading. This can and does happen spontaniously, but with all the sinus surgeries, I can see why you might question this. Having stuff drain out into your throat can't feel very good or comfortable. Are you in touch with a great Surgeon, or a PCP who could give you a referral? I would keep going until I found some kind of answer. I have had infections where my ears plugged up, that is miserable. Hope there can be some resolution for you. Are you seeing an ENT? What field of medicine have you been in touch with for this? I will keep you in my thoughts and prayers. ginnie