I think it could be die-off. i've been doing a parasite
cleanse for 3 months. whenever i'm on the herbs, my voice gets scratchy, sore, and tight. ears and sinuses too. it gets bad enough that i have to limit my speaking. but when i take a break from the herbs it clears up. i don't know if it's the herbs themselves or the die-off, but i'm thinking more the die off. but it could be an allergy as well. my lymph nodes swell up too. killing parasites
releases a lot of toxins for the body to deal with. it's no picnic.
regarding the lungs. the different worms that inhabit the body live out different stages in the lungs. read about the 'ascarsis' worm's life cycle. and then there are lung flukes. and a host of other parasites
that can live in the lungs and sinuses.
but even so, having your sinuses drain is reported as die-off by a lot of people. so it could be either or both.
what herbs are you taking for parasites? do you have a break scheduled any time soon from them?
read my story that i posted here and look at the links within in before you ever consider Antibiotics
again. even OTC meds have done a number on my liver.
be patient. it has to get worse some before it can get better.