Newly diagnosed adult with Aspergers. How can I make my sister understand?

She's going to need time, especially if you've exhibited a pattern of diagnosis-epiphanies-failure-diagnosis, etc. You, yourself shouldn't just think of yourself as having all of the answers with this diagnosis. With any condition comes residual effects- habits you've cultivated as a result of dealing with or not dealing with the condition. Its just been a week- a good week sure, but its ridiculous to expect a great change in every aspect of your life. Remember, not everything is black and white. There are many, many gray areas (and different shades of gray). Also, if Aspergers really is what you've had all along, that means that your sister has some APOLOGIZING to do that she may not be ready for. She also may not be ready to let go of her perceptions of you or the dynamic of your relationship with her being the normal one who's annoyed with or embarrassed of you. Maybe she feels like a jackazz. :) Give her a lot more time... months... maybe a year or more. Avoid trying to convince her verbally, just stay on the right track and allow her to see your improvement for herself. Also, be kind to her and remind her to be kind to you. Congratulations, I hope things are great for you from now on.