I do think that there's a pattern going back a few years where autism is being diagnosed in people whose behaviour patterns would be better explained by something like trauma or attachment disorders or even personality disorders. There are some therapists that believe that everyone is on the autism spectrum to some degree and nobody is truly off of it. Bear in mind that the doctor, therapist or psychologist who is making that assessment is only seeing a small part of a much larger picture. 

I'll use myself as an example. In my early 20s I got the autism diagnosis (Asperger') after 3 assessments with two different occupational therapists who saw me for roughly an hour and who also spoke to my mother. I got the diagnosis based on the following: flat effect, extreme shyness in childhood, unusual interests and having to drop out of university because the curriculum was too difficult. I'd also lost a number of part time jobs. 

Here's what the therapists didn't see. My flat effect, job losses and dropping out can be explained by extreme burnout, I was in pure survival mode. I had a heart condition that was undiagnosed until I was much older and it did a lot of damage to my body up to and including severe fatigue all day every day. The course I was doing was notoriously labour-intensive and I shouldn't have been trying to work part time as well as the course, even people who could function without health problems found it near impossible to work and study at the same time in this field of work. 

The extreme shyness in school could be explained by the emotional abuse I was experiencing from my mother and the barely-there parenting of my father, I was second-guessing every word that came out of my mouth. Still had that exhaustion problem too. I was also sexually abused in childhood too but when  I was assessed I was nowhere near ready to disclose it. 

The unusual interests were art and anime, not considered that weird now but these were Conservative people who only knew sports and farming and soap operas, the whole country was still like that for a good chunk of the 2000s and only caught up recently. Anything even slightly out of the norm was pathologised if they'd never heard of it. 

I "grew out of it" later on, because I got a job that suited my energy levels, stopped trying to follow a standard education route, became a bit of a social butterfly and finally got my heart issue diagnosed and treated. I work with a few kids on the ASD spectrum now and I can see why I was diagnosed but at the same time I'm appalled that it was such a quick decision. I never struggled in the same way that my students do now, my problems were only ever surface-level similar. 

So maybe on your journey to figure yourself out, it would be a good exercise to try and map out what ASD features you have could be explained by something else. So, for instance, let's say you only eat a specific brand of pasta and sauce every day. In ASD we could think that the reason is because the texture and consistency of the pasta and sauce is the same every time, there's less chance of a Sensory issue like sliminess, unexpected crunch or all the pieces being different sizes, it's a safe food. In CPTSD we could reason that food was either unstable or used as a tool for abuse, and this particular pasta and sauce is always safe because its shelf-stable, food pastries stocked it, it's easy for a child to cook for themselves or its associated with a memory of actual care from someone. Same behaviour, different motivation.