your problem seems to be because of eustachian tube dysfunction for that u need to start doing valsalva maneuvar( videos are available on youtube) and take steam inhalation followed by an steroidal nasal spray.
Next Steps
And take anti reflux treatment and avoid delaying your meals they can cause reflux and becoz of that also area near eustachian tube gets inflammed and causes fullness sensation
Health Tips
For ANCA reports consult an rheumatologist