Autism

Honestly? Just keep living your life. It can come as a real shock to discover you are autistic, but you have to remember that you have been your whole life and have made it this far. It will take time to come to terms with - if you need help processing, that's exactly what therapy is for. Many health insurance plans these days cover a few sessions a year. If you're still on your parent's health insurance plan and are worried about asking them, you can just say you're working through some stuff happening at work/school/friends/whatever. Or that a lot of your friends have benefited from it and you want to try it and see.

With time you'll come to accept that this is just part of who you are. It doesn't define you, and it's not a new thing that's going to throw your life off course. In contrast, it will likely actually improve your life over time. Understanding this about yourself will help you see and understand a lot of feelings and behaviors you've been unable to explain in the past. And now that you know about these things, you can seek to improve yourself or set healthy boundaries depending on what's appropriate. It's a journey for sure, and there will be parts that bring new meaning to "ignorance is bliss". But in the long run you will be a better person for it, more comfortable in your own skin.