Update:
I talked to my local pulmonologist last night, and asked him about the sinus flushes, again he said the tap water was not used mainly b/c chlorine irrates the lining of the nasal passages.
I asked him about breathing in the particles but he said that the nasal passages arent sterile to begin with so they arent concerned about flushing with sterile water although the saline in the water acts as a somewhat antibacterial agent he said anyways, thats why you put saline in, instead of just water he said.
He said lungs, you have to be sterile with, but not the nasal passages....
I am calling my real cf center as soon as my contact lady gets back, she'll be back on monday...
otherwise im just holding off haha