Good luck with getting some resolution on the behaviour. Regarding the eating, I wouldn't be concerned about her not eating potato, rice or pasta. Does she eat healthy food stuffs vegetables, fruit and protein?
My dd is a fussy eater and had lot of difficulties with food textures when younger. She used to be obese. She's now overweight and we are working on her weight. She is also 8. She has some sensory issues with clothes and her hair. She doesn't fit into the full blown sensory processing disorder category either. What I find now that she's older with clothes and hair is the more anxious she is, the more prevalent the issues become. For example she thought she was late before school yesterday so she rolled around shouting and refusing to go to school because her hair wasn't perfect. It was a short lived effort though - unlike those of the past. The start of the school year is always hard as she is very anxious then and becomes stroppy, tantromy and her sensory issues really blow up. These are the times when she most needs a cuddle and to be told everything will be ok.
I know nothing about ASD if this is what she has. However I would be more concerned with your dds behaviour and let the sensory issues heal themselves as you find a solution for her to become less unhappy and less anxious.
We saw a child psychologist for about 5 months when dd was coming up 6 in yr1. I'm very poorly. Dd was totally out of control with me. She completely ordered me around and was shouty, tantromy, very immature. Because she suddenly realised just how ill I was. And she thought the best way to manage it was to be in charge of me, made me go everywhere with her, ordered me around, stopped me from leaving rooms. It was emotional blackmail. But because I was so ill, I didn't see it. I learnt from the child psychologist she basically stopped developing when she started school as I'd managed to hide just how ill I was from her till then.
You sound quite poorly too. Your dd may well have ASD. I'm just wondering if your dd is having issues with having a poorly mummy and this is making her symptoms worse or her anxiety about you is actually creating all the symptoms. Had I not seen the child psychologist, I think my dd could be acting in a similar fashion to yours by now.
My dd said she hated seeing the psychologist as well. This is entirely normal because it was bringing her out of her comfort zone. The woman we saw was brilliant. She came to our house for 2 hours once a week. Sometimes dd refused to work with her and the woman knew exactly what to do and how to work with her. And by the end of the two hours dd had done some kind of work with her. She bought her lovely stickers and did big sticker charts, and gave dd treats and certificates for working hard. Dd earnt points on the sticker chart and the points earned, she used to buy clothes, special outings or other stuff she wanted. She brought her a book, which they wrote and drew things together, which could be secret from dh and I. She involved us and picked apart how we were helping create the situation and got my dd to tell us how she wanted us to act. Does this sound like the child psychologist you've been using?