I agree, it is hard. Did I 'know'? No. I was a new parent to a PFB. Did I know enough about children to 'know' that this wasn't what I thought it would be? Certainly. Did I suspect that it wasn't all quite right? For sure.
When?
The day she was born, when they found she had a positional talipe of her left foot. They said it was normal, and physio would contact.
The day she was born, when they wouldn't let me go home until a senior paed had checked her over, because a junior doctor finally admitted to me (after me saying 'there is SOMETHING wrong, what aren't you telling me????) that a midwife thought she 'looked like she had Downs Syndrome'. . He said she was fine (he had just come from a major car accident involving children. I wonder if he would have been more cautious if his mind hadn't been on the children he'd admitted to ICU?).
The night she was born, and the next 12 weeks, when she screamed ALL NIGHT LONG from 10 until 6, only pausing if we smacked her so hard on the back that it seemed like child abuse.
The weeks after birth when she would puke half her feed up every feed, and I got to the point when I only changed my top if I'd been puked on 4 times.
At her 8 month check, when I said that her sounds didn't seem like I expected them to, and that she didn't respond to noises as I expected (she would be acutely alert to quiet distant sounds, like a door opening quietly, but completely ignore a plane, hoover, dog barking, etc.).
At 13 months when she still couldn't pull herself to stand, despite trying.
At 15 months when she could pull herself to stand, but her foot splayed outwards.
At 17 months, when she tried to cruise but couldn't. She saw a physio, who put her on 3 month recall.
At 20 months when I begged DH to take her home after he'd brought her in to see newborn prem DD2 in hospital. The final straw was when she started to climb in the crib, after crawling under lots of pregnant women's curtains.
At 20 months when I trekked across the hospital from my room, leaving prem DD2 with DH, while I went across to physio with DD1. They discharged her as 'just late, but normal'.
At 23 months when we spent DAYS trying to get her to walk between us. She finally did, then the next day walked over a mile, refusing to rest.
At 2 when I used to have to take a stairgate with me to visit afriend. Used to have to say 'please remove any shampoo, conditioner, washing up liquid, toothpaste, etc., from low surfaces.'
At 2 when I couldn't take her out without a wrist strap, because she just COULD NOT stay for even a second beside me. Not normal toddler stuff, just rampant chaos.
At 2.3 when I had to abandon DD2 on a change mat, yelling to the HV 'keep an eye on her please!!!' as I bolted after DD1 who had escaped yet again from the clinic room.
At 2.6 when she used to kiss bins on the way home from pre-school, and the journey home took us 45 minutes when everyone else was home within 20.
FINALLY
At 2.9 when the pre-school asked to get someone in to observe her, and that person recommended 1:1 support.
At 2.10 when she started falling over for no reason at all. That day she went to hospital, and stayed over night. That day we saw a senior registrar, at 9pm, and he uttered the words 'I think you'll be seeing a lot of us....'
At 2.10 when we met 3 different Consultants, and our Paed took her on as 'his patient'.
At 2.10 when we left the hospital for appointments for EEG, ECG, 24 hour tape, CT scan, etc.
At 3.0 when her EEG results showed epilepsy.
At 3.5 when her MRI results showed a brain malformation.
How a child who needs special school education gets to 2.9 before they are even flagged for investigation is beyond me. The signs were there. Perhaps, they wouldn't have found anything if they had investigated at birth. But, perhaps, if the Paed who said 'not Downs' had said 'mmm but experienced midwife says she has dysmorphic features...perhaps we need to look closer', then she may have had more support than she did from an earlier age.