I’m so sorry to hear you have PET also. It seems to be a very rare affliction. I’m 77 and have dealt with it for 20 years after a cerebellar stroke. None of the ENT specialists I saw here in New Zealand had heard of it, so I did my own homework. Took time! Eventually I found something that has helped me significantly. I believe it is readily available in USA as well. Neilmed sinus rinse. It took me quite some time to work out a process but it works for me. Hopefully it may help you too. All I do is take one strong sniff in to nostril, tilt my head to one side until I can feel a small pop. A bit like a clearance. Bring head back to centre and ‘snort’ the rinse out into hand basin. I then repeat the same procedure on the other side. I think the trick is to hold the saline solution as long as you can before releasing it. I seriously give it a very ‘forced snort’ out, otherwise it doesn’t work for me.
Of course it’s impossible to do this while you’re out anywhere but I’ve also discovered by slowly drinking a cup of hot water as I sit in the car (can’t socialise) quietly focusing on relaxing my body this method works well for me.
When one is desperate they will try anything. I sincerely hope this is helpful for you.