Hello, I'm sorry, this is enormous! 
I've not been in this section before and I've namechanged to shield my usual name from anyone in rl who will recognise me from my description of my son/ the situation.
When my ds was born everything seemed fine, good weight etc, etc.Pregnancy had been fairly straight forward, a few incidences of decreased movement, one incident caught on hospital recording equipment where they said the baby had been squeezing the umbilical!??
Had a natural labour, all seemed good.
Noticed a problem with my ds's ears within a few days, they had a cup deformity ( top part of the ear rolled down) and stuck out at right angles from his head. I was told he would need surgery to correct them at some point because it was quite extreme. Hoping to avoid this we used ear buddies to reshape his ears and it has worked brilliantly.
I noticed before we left the hospital after he was born that his right foot was twisted so that his sole was pointing towards his left foot whenever it was in a relaxed position. I was given a refferal to get him checked out but it was a long way off so spoke to a relative who happens to be in the right medical field. She gave me exercises to do to his whole leg and it improved lots over the next few months, when we finally got to see a doctor at the hospital he was really pleased with the exercises and said to continue for another month or so, but otherwise it was as good as it was going to get and very unlikely to cause any probs.
Developmentally at 1 year he was ahead of where he would have been expected to be, I can remember him doing the tune to twinkle twinkle.
Then at about 1 year old, my ds started outward breathholding. If he hurt himself or got really distressed he would scream outwards, fight like mad to try to breathe in, go blue, pass out, and then I would wait for him to start breathing gain. I have lost count of the number of times i've had to make him breathe again. I've now been told not to wait and to begin resuss as soon as he is unconsious.
At 20 months he had a febrile convulsion.
The tantrums, completely blank stare whilst screaming, throwing himself backwards, bashing his head on things if I couldn't catch him quick enough. It has been really difficult, from when he started breatholding (roughly) his development pretty much stopped, very few new words. Completely attached to me, very 11month old like in his separation anxiety.
I was on the verge of speaking to the gp about developmental delay when I started to noice a change. He gained a few words, a few new noises, started to play alongside other children again. etc...
He's now nearly 3 and as far as I can tell his development is pretty much normal for his age. He very rarely breathholds, very rarely tantrums at all. The difference in him from 6 months - 1 year ago are as though he is a different child.
My dp describd his development as though he suddenly went on a tangent for 2 years.
But I'm worried. Why did he stop developing so drastically? He has started singing Twinkle twinkle in the last few months. Its like he has picked back up where he left off.
My relative who gave the foot advice has admitted she thought it may have been caused by a bleed in his brain. Could a second bleed have caused the change in behaviour/developmental delay? If so could it happen again?
I know that ears and brain develop on the same day of gestation hence why i'm mentioning it.
Is there a link between cup ear deformity, hypotonia,developmental delay? I've been googling and I can't find anything that seems to fit.
I 'm so sorry that is so long, thanks if you made it to the end. I just don't know what to do next. I don't know what questions to ask where.
Thankyou