Not technically, but it could be a pattern that is indicative of autism. If you’re interested in assessing yourself, here are a bunch of online tests that could give more clarity. However, no online test is sufficiently valid enough to diagnose autism. You need a thorough assessment by an autism specialist that uses a standardized scale such as the Autism Diagnostic Observation Scale-2 (ADOS-2) which takes hours and maybe even multiple visits.
Self diagnosis is valid as well as long as you don’t need accommodations at work/school.
I usually assume that people who self diagnose are looking for things to help them feel better. If strategies don’t work they try different ones. I don’t see much harm in that.
Also there are still a lot of people (especially minorities) who won’t get diagnosed or can’t afford it. So what else are they supposed to do?