Potential Autism Diagnosis in my Fifites

Hey, thought I'd introduce myself.

It's only relatively recently that I've realised I might be autistic - I say I might be, as I haven't been officially diagnosed, although the online tests I have done seem to indicate autism. In fact, it was literally earlier today that I contacted my GP and got the autism diagnosis ball rolling.

i think many people I know would be surprised if they read this - it's not obvious from the outside, but I realise I've become incredibly good at masking. People would look at me as living a norma life - I'm happily married and have two wonderful children. My (potential?) autism shows in the following ways:

I do avoid eye contact (although I wasn't particularly aware apart from the fact a couple of people have recently mentioned it)

I've had a background anxiety my whole life, which peaks and troughs but it's always there - I started biting my nails at the age of 4 and that continues nearly 50 years later.

If I'm in society, the moment I'm alone, I need to release - I repeat phrases and just do weird ***, but the moment someone's around, I'm 'normal' again.

I feel like I'm acting most of the time and I fit in with the company - not so much now, but when I was younger i'd build a relationship with someone, but worry they'd find me out (work out that I wasn't as normal as them).

I have this weird thing, where I can't simply read a random book or listen to an album (I love both books and music). But I have this thing where if I like a song, I have to listen to the artist's songs/albums in release order, or read all of an author's books from their first publication to the last. If I don't, it doesn't feel right - I literally can't do it any other way.

I'm obsessive about time. If I have to be somewhere at a certain time, I'm always early - ridiculously early usually, so much so that I have to kill lots of time. The thought of being late fills me with anxiety. 

I have lots of short terms hobbies, which take over my life and they become super important to me, then are quickly dropped and I move onto something else. 

Now I don't know if any of this means I have autism - I'd be interested to know if anyone has any of the same traits. But I guess the main question i have is - what do I do with the knowledge that I (potenially) have autism. Joining this forum and posting here is my first step. Thanks for reading!