Sorry it's long!My 10yr old son!

[ArmyWife041408]

I'll have to give you a brief background before I ask any questions.I've had a couple docs say that my son has PDD-NOS and tried to refer him to the Autism Clinic, but our insurance(Tricare-military)denied it and sent us to the Dev. Peds Dept at the base clinic.They said that he does not have PDD-NOS but does have the ADHD(the other docs said yes to this and PDD-NOS)and anxiety disorder, and just now mild depression.My son still has symptoms of PDD-NOS and I'm getting pretty concerned.He was holding his #2 in for so long that he streched out his anus muscles causing him to have #1 and #2 accidents.The doc gave him some Miralax and he has to take daily and slowly work on getting his muscles to work normal again.My husband and I thought things were getting better because he was only have 2 #2 accidents a week and maybe 3 #1 accidents a week.We had to pull up his carpet in his room from before because he had #2's in his room or they were in his pants and fell out, the room smelled really bad and it was just not santitary.But the smell just wasn't going away but we looked everywhere and found nothing.I had to wash his bedding daily(thinking it was just on him and that was where the smell was coming from).The smell still didn't go away.Then we saw some #2 hand prints on his window and we openned the window and found(and I'm not exacgeratting about 10lbs of #2 thrown out the window onto our roof!Now here is my question(finally..sorry it was long), Has anyone had anything similar to this with an Autistic child?Could this be from him having PDD-NOS or ADHD/Anxiety.The doc said that he doesn't know when he his doing #2 because he doesn't have the feeling down there but that's not what I was trying to ask him...we know they are accidents what we are not understanding(and either is the doc)is why he doesn't clean it up afterwards...there is no way he CAN NOT feel that he has #2 in his pants or #1(he's got to feel wet or something in his underwear).Is this just me going through this and if not...how do I get his docs to look more into PDD-NOS.Thank you so much for any advice and I'm so sorry this is so long!
Very confused mom of 8!!!