Speech regression and fear?

Hello all, I’m new here and really looking for some advice before reaching out to the doctors. 


I have 3 autistic children ( 2 boys & 1 girl ) my middle boy (10) has recently been showing signs of some form of regression. he’s a keen biker competing in motorcross at a decent level up until 8 weeks ago raced weekly.

Over the last 8 weeks not only has he pretty much forgotten how to ride a bike we’ve noticed his speech and ability to complete the simplest task has diminished. From personal hygiene to general chores such as clothes in the washing basket or moving his plate from the table. 

He has become withdrawn and quiet which with a diagnosis of ASD/SPD & ADHD is pretty noticeable. 

We are at a loss of what to do or how to help him as this is the first time we have witnessed this with him. Consistent reassuring and 1-1 time with each parent doing a range of activities doesn’t seem to be working. 

any help or advice greatly received.