When I was beginning to suspect that I might be autistic I started to do more research on it and found some tests online. Embrace Autism is a great resource and has very detailed tests that if you score certain number it could mean that you are autistic. I highly recommend looking into that. Hope it gives you some clarity.

I'm self diagnosed. It's been 2 months since I started my journey learning about autism nearly 24/7 and watching tons of youtube videos from autistic females like yo samdy Sam, mom on the spectrum, the thought spot, purple Ella, Olivia hops, and the rachelistic channel really helped me feel some solidarity that I wasn't the only person who went through certain experiences as I child. They all have videos on the dsm-5 criteria and give examples of how it relates in their lives which I related to as well.

I'm in exactly the same situation. I suspect that I may be on the spectrum but I have absolutely no idea how to get diagnosed or how to even bring it up.

Look up embrace autism for their website and take the six psychometrics assessments to self screen for autism, it may make you feel more validated. Since it's really hard to find a specialist that will diagnose autistic adults, self-diagnosing is valid. But if you need a diagnosis for accommodations then the same site I mentioned previously can help you with that, it is costly though.