Should we pursue an IEP? And general hyposensitive advice.

My son is 6 and we chose to retain him in K another year (bday is 2 days before cut-off and our school has much older kids, the age range was 16-months last year!). Academically he did fine, but hard time writing, focusing on journaling (would talk to others, kick chair, chew on sleeves). We brought up retaining; they agreed and we all chalked it up to being young/emotionally immature. Then SLP (mild articulation issues)brought up hyposensitivity. Did some reading and WOW, it was my son- hyposensitive. Made sense.

So we are just finishing an evaluation through private OT but we are out-of-network for this place so we'll have to pay alot (they applied to be a provider and insurance said they weren't taking new businesses). I will appeal which only increases their payment to out-of-network payments a bit-- and in my area there are few that specialize in this and LONG wait lists (despite living in a fairly major urban area).

So I contacted our school district (pre-OT eval); we are in a private (parochial) school. The district psychologist wanted a meeting with our K teacher, principal and me to discuss the issues. And then I read the paperwork, about how is this impacting his ability to succeed in school. So I put a hold on the meeting because current teacher (it's only been 3 wks) thinks he is doing fantastic and he is-the work isn't hard but she'll see it later. Previous K teacher would be on board but then again, the SPD isn't interfering with school, per se.

SO, do I still go through all of this? I have asked our current OT who has only seen us twice her opinion-- since she also works at a public school as an OT. Her evaluation won't be ready for a few weeks. Maybe I wait for that, and then email it to the district saying I'd like an OT eval and attached is his current OT eval?

Also, I suspect and OT agrees it's mild-to-moderate, how long does OT generally last? Months or forever? I understand we'll get tools and he'll get tools (sensory diet).

I have the Out of Sync Child- any other suggestions? Also ones that focus on hyposensitive? I think the book and most of what I find focuses on hypersensitive.

Thanks!