First flying with Autism

I'm due to fly for the first time in a few days but Have already seen a lack of appetitie as my anxiety is on one with all this stress.

I'm wondering how everyone has coped with Anxiety and how you have found your first flight.

Is there any tips for first time flyers which I haven't covered yet.

I have done the following
Airport Familation Visit
Destination Research
Packing early
Sorting out music
Preparing Lavendar Oil resucue

But i'm still struggling with stress of this pre flight stage and I'm getting the autism stress pains which is not good