Hi freefallin .....
First of all, take several deep breaths, you obviously have many health issues going on here, but anxiety makes all of them much worse. Do whatever mental processes you need to to bring calm to yourself so you can think through these things more clearly.
As the others have said, basically only an MRI with contrast will confirm or deny the presence of an acoustic neuroma so you really need to see a doctor for that referral/order. Even your PCP can order the MRI.
Yes, your symptoms are consistent with a possible acoustic neuroma, but they can also indicate other medical reasons, as well.
My recommendation (other than getting an MRI) is to eliminate all caffeine, salt, and refined sugar and see if it helps any of your symptoms, especially the severe headaches. Post-op headaches are more common with ANs than a presenting symptom, although it can be a significant symptom if you have an AN close to the brainstem or the trigeminal nerve.
Thoughts and prayers for peace and calm as you do whatever it takes for relief.
Clarice