Finally I KNOW!

[Priestess]

Well, one of my aunts has 6 toes on each foot And on that side of my family there are scattered cases of zero-virilization/sterility. I'm not sure if there is a connection.

It should be easy enough to tell if you have AIS or something else. AIS tends to result in having no signs of even normal female virilization like UA/pubic hair.
And if in doubt, they have a test involving applying a bit of testosterone gel to some part of your skin and seeing if any hairs sprout up.

Your case would be similar to my own, perhaps, except that my uterus etc aren't tiny. And the doctors harmed me greatly by bickering over how "XY" conflicted with what they were seeing, instead of treating me. It took a long time, but I did find a condition that was an exact match for all my symptoms and test results.