Trouble sleeping

I have terrible trouble sleeping. I either can't get to sleep or I wake up multiple times throughout the night. I've always had this problem, started in my teens, but I'm still like it now despite originally everyone telling me it was a girl thing and related to puberty.

I used to think it was where I'm just weird but now I have been diagnosed with Autism and according to the woman who assessed me this is common for people with Autism.

I wonder what causes the sleep difficulties?

For me I wonder if it's anxiety related as this is something I struggle with chronically on a daily basis but it could also be things like my mind not being able to ignore things like the wind blowing, or the house creaking... Or my head aching when I lay a certain way on my pillow.

I'm very sensitive to a lot of things and I wonder if this is also causing me grief when trying to get to sleep.

I'm still learning so much about autism and myself. Sorry if this has been mentioned before and if it's not even related to Autism.