Hi,
Please try not to worry to much as I know how much these thoughts can take over.
I have 3 children, the eldest was diagnosed with ASD at 7. I knew about 18 month as he didn't really babble or share much with me. He was afraid of everything including shadows, huge sensory overload, didn't like noise, struggled with messy play, wouldn't walk bare feet on grass, sand... extremely fussy and afraid of food (texture and colour). The biggest thing is that he just didn't connect properly with me, there was limited eye contact, very brief. She's now 16 (decided to transition to female), very verbal, amazing personality, incredibly bright, but socially anxious and struggles with emotions.
I have a 4 year old who was diagnosed last year with ASD too, much more obvious with her, she has the worst meltdowns, speech and communication difficulties and very demanding behaviour. She doesn't suffer much with sensory issues and her motor skills are unaffected.
Then I ask have a six year old whom I thought was just quirky,...until last year when it became a bit more obvious that she was also on the spectrum. She's currently going through a diagnosis. She is very very verbal, loves to be active and has an amazing imagination. He's disabilities are intense constant anxiety (mostly irrational), sensory seeking behaviour (spinning a lot, chewing objects) and sensory overload (fear of hand dryers, blenders etc... she hates wearing socks as the seams irritate her, she won't wear jeans or other stiff/tight fabric. Struggles with everyday smells.
she also fits the diagnosis criteria for adhd but as she is getting older the ASD seems much more apparent.
I hope this helps you in some way. The reason I wanted to reply is to say that even with 3 dc they are all so incredibly different, perfectly unique and I honestly wouldn't change them. I would like to ease their struggles but I see autism as a special part of their Beauty!
I did overanalyse everything the younger ones did when they were babies as I was almost playing detective and expecting to see evidence of ASD.
I am also on the spectrum which caused me to over focus though which I think may of played a part with that.
How is your dd with communication? Does she want your attention? Does she enjoy messy play?
Does she have any strange anxieties?
Try not to worry, x