Maybe you need to re-frame things a bit:
Yes, you are having trouble at school because people are mean to you and the way you interact with people--and you think the reason is ASD.
Yes, you have trouble interacting with people--and you think the reason is ASD.
Yes, you ARE attention-seeking--because you are unhappy, not coping, and feel like you could do a lot better with treatment for ASD.
It's OKAY to seek attention when you feel bad. it's not stupid to ask for help, in fact it's very smart and mature. Whether this is autism or something else, you obviously need some sort of help to feel better.
I agree with the idea of talking to the counselor, and also printing out the tests and lists for your mom to read. My mom didn't believe me either, until I gave her a list of all the symptoms that matched.
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Diagnosed Bipolar II in 2012, Autism spectrum disorder (moderate) & ADHD in 2015.