SN Regression/Progression Cycle?

My sons speech regresses and progresses every other day. It is insane how MUCH he regression/progress and how often it happens.

Some days he can talk in multiple words, form sentences, and repeat thing.
The next day hes back to using one words, his vocabulary shrinks, he doesn't repeat thing, and mumbling.

Does anyone else have a kid dealing with this? Have you had any answers about why they regress/progress so much? His teachers and speech therapist have told me the same thing about him. His comprehension seems to regress and progress too.

My SO's cousin is like this (he's 4).. One day he's very verbal and the next day hell barely speak a word.

Quoting L&J ♥:" My SO's cousin is like this (he's 4).. One day he's very verbal and the next day hell barely speak a word."

Do they know why? My DS is almost four.

<blockquote><b>Quoting Jax.:</b>" Do they know why? My DS is almost four."</blockquote>


He was diagnosed with autism and pretty much say that he has "triggers" that will throw his day completely off. So they try to keep him in the same routine very single day. I haven't really noticed a difference to be honest. He's also in speech therapy.

My son doesn't have autism but he has a severe speech delay and if he doesn't have therapy for more than a couple days his speech will regress a lot. So Mondays are his worse days and by Friday he speaks in full sentences. He's 3 1/2.

I never really can pinpoint a reason behind it, but DS has days where he just CAN'T answer a single question we ask him. He will literally regress to pointing at what he wants or throwing a fit because he can't answer a question we've asked him. And he's 6. He's never been diagnosed with autism or any other disorders and it varies from day to day.


ETA: Other days he has a very large vocabulary and shows perfect understanding of things you would normally think were beyond the comprehension of a 6 year old.