Food stuck in sinus! Help!!?

I sneezed while eating and some food came out my nose but there is a piece of something still stuck in my nasal passage. I've tried lots of blowing, snorting, sucking with mouth closed and nose plugged, flushing/irrigating with tap water and with salted water -gently and forcefully- from both sides. Nothing works! It feels like I actually made it worse. It's giving me a headache, I feel pressure under my eye and that eye is a little puffy. Will this work itself out or turn into an infection? How long should I wait before seeing a doctor, or should I only go if it starts to feel like an infection? Should I give it some time and then try again myself? Should I be trying to suck it in or blow it out? I had been eating popcorn, so might it be a piece of a kernel that swelled up from the water? Would that make a difference?