11.2 is really not that high. There is plenty of hope, and you probably won't need IVF at least not right away unless you discover something physical that could prevent pg. And because you've never had a "baseline" FSH (none of us have), you never know if you're just one of the people who's always been above average, as I suspect many of us could be. My FSH last cycle (a natural success) was 22. I'm currently 5 wk pg.
An AFC could be really useful, but then again, it might not be, as my AFC this cycle was only 3. I also was given my dx when DS was about 18 mo, so I understand your feelings. Remind me again how long you've been off BCP/TTC? Are you having regular cycles?