It sounds like you have a middle ear infection, or that there has been some damage to your eardrums. I would recommend that you see an Ear Nose and Throat Surgeon and not a GP.
I would also strongly recommend that you see an Audiologist for a diagnostic hearing evaluation to assess what the problem is in your outer, middle and inner ear.
Once they can see what the problem is they can treat it accordingly.
Sometimes middle ear infections can make a person dizzy and nauseous, but with a car accident you may have damaged parts of your balance system as well. It is recommended that the ENT that you see assesses this, and also that when you do see an audiologist, you go to someone who is qualified and has the correct equipment for balance testing.
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