Vonda:
Hello and welcome, although I wish you didn't have a reason to be here. Since you do, allow me to respond to your questions and offer some observations that may be helpful to you.
Your AN is relatively large but that is not an insurmountable obstacle to a good outcome. I had a similarly-sized AN yet enjoyed a very successful surgery and radiation process that left my facial nerve intact and with no complications worth mentioning. It can happen and it isn't all just 'good luck'. I had a caring, compassionate and highly experienced neurosurgeon who was as concerned about my quality of life, post-op, as he was about destroying the tumor in my skull.
You're in good hands with Dr. Brackmann and I would strongly suggest you explore the possibility of surgery-then-radiation. Unfortunately, I cannot tell you whether breastfeeding will be possible after surgery. That is a question for a licensed physician that has examined your medical information to answer. I don't wish to mislead you one way or the other.
As for the your apparent lack of noticeable balance deficits, that is a benefit and not completely unknown with AN patients. Some patients don't lose much hearing, either. It all depends on, not only the
size of the tumor, but the exact
location and
configuration of the thing. I cannot accurately predict what level of athletic activity (horse riding, specifically, in your case) you'll be able to engage in, post-op. I doubt your doctor can, either. Most AN post-op patients slowly but surely get back to physical pursuits although it often takes a lot of work motivated by a love of the activity. I think your desire to ride will be enough to help you overcome any AN-related obstacles.

As for your quite reasonable concern with possible surgery-related facial paralysis: that fear is valid and there is no need to feel embarrassed for being worried about your appearance. I'm older and not much to look at but I still had a deep concern about facial paralysis after my surgery. My neurosurgeon acknowledged that and set up the surgery/radiation plan to destroy my large AN and not damage my facial mobility. He succeeded. I experienced no facial paralysis or or related problems and today, 28 months post-op, I'm pretty much back to normalcy.
My final thought to you is that you have to explore all your options, educate yourself and be pro-active in your treatment. This website is a great place to begin. Lots of knowledgeable folks with good, practical advice and real empathy to offer. The ANA will send you literature that explains, in easy-to-understand language, the facts about acoustic neuromas. Check the website's home pages for the link.
I hope you'll be a frequent visitor here, Vonda and I trust you'll gain from doing so.
Jim