The other side of the coin
Casey, why does your SO think it's disgusting? Is it because she can't understand how in the world you think that looking feminine or sexy is fun and relaxing? Or is it because she has definite ideas of 'gender appropriate' clothing? You may want to sit down with her (when she is willing/wanting) and find out.
Has she asked you the questions that SOs usually ask when they have first been told? If she hasn't, she may still be trying to wrap her mind around a few things. Lots of communication is going to be the key. She may just want to ask you a question in the middle of the day, get an answer, and leave it be for a while, without getting into a long conversation about it. Baby steps.
Also, and always keep this in mind, you've had (from the sound of your post) quite some time to get used to this. In that time you've been able to come to terms with it in your head and your heart. You CAN NOT expect her to come to terms with things immediately. She may very well need a lot more time than you did.
I hope everything works out for you, sweetie.:hugs: