Hi Sy,
Perhaps this driving in central NJ thing is making a mountain out of a molehill (Sorry, I couldn't stop myself).
However, the kidding around does raise an important point--an individual can become so preoccupied with bodily sensations that even normal ones are interpreted as evidence of pathology.
After returning from Bonaire early last month, you posted regarding the development of congested ("clogged") ears. This was followed by several additional posts, including this one.
At that time of your Bonaire trip you indicated you were using a "nasal spray before diving," so it seems possible that all was not well to begin with regarding the ENT system.
You since have been under the care of an ENT in whom I assume you have confidence. About a month ago she put you on a course of an antibiotic and an oral steroid after diagnosing fluid in the middle ear space. This is a somewhat aggressive, but fully appropriate plan of treatment.
The clearing of fluid from the middle ear space takes time, even with drug treatment. It is possible that you still have a small amount of congestion or inflammation. And, transient changes in air pressure inside of a car can result from windows being opened or closed, or even relatively minor changes in altitude.
What is likely to make you feel better is simply to relax and stop focusing on every blip your ears may make. The expectation is that if it hasn't already, all fluid soon will be drained/absorbed.
If your symptoms genuinely appear to be getting worse, or your anxiety gets the better of you, recontact with the ENT is always a possibility.
Helpful?
DocVikingo
This is educational only and does not constitute or imply a doctor-patient relationship. It is not medical advice to you or any other individual, and should not be construed as such.