It's really hard to tell what might be going on at such a young age.
The language difficulties with autism don't always involve delays. Some kids with autism talk which early and seem to use words that are advanced for their age; but as they get older, it becomes apparent that they have issues with pragmatics (the social use of language) or other language processing problems. Social issues are also difficult to determine in toddlers and may not become clear for a couple of years.
Additionally, kids can by non-typical in ways other than autism. As others hAve mentioned, ADHD, sensory processing disorder, OCD, and anxiety could also be possibilities.
Even though your DS may be too young for a diagnosis, you can still try some of the approaches that are used for autism or other disorders. Things like visual schedules and sensory diet might help.
Gena
DS, age 11 and always amazing
“Autistics are the ultimate square pegs, and the problem with pounding a square peg into a round hole is not that the hammering is hard work. It's that you're destroying the peg." - Paul Collins, Not Even Wrong