Hi Theregee and welcome to this forum .....
First of all, take a deep breath and try to relax until you have a diagnosis.
Unfortunately there are several other things besides an acoustic neuroma that can cause the symptoms you are describing.
To answer your questions:
1) Although single sided hearing loss and tinnitus can be hallmarks of an acoustic neuroma, so can other inner ear diseases cause these symptoms
2) With the improvements in treatment today, it is quite uncommon to have either CSF leaks or facial nerve damage from surgery for an AN ..... especially if you choose highly experienced surgeons
3) If and when you are diagnosed with an acoustic neuroma, your new friends on this forum can tell you many of their experiences with various physicians around the country. That will include doctors who do surgery, doctors specializing in radiation treatment, and doctors recommending you watch and wait.
The main (and most accurate) way to diagnose an acoustic neuroma (vestibular schwannoma) is through an MRI done with contrast. I would urge you to go to your ENT and simply address your concerns/fears and ask for an MRI with contrast.
Thoughts and prayers and let us know what you find out.
Clarice