Hi my son is 17 months , but he is physical 6 months old , his sight is of a 4 month old , his speech and play are not far off a new born , he failed his hearing so is waiting to be taking in to get a general for more test . He has had an MRI scan done and came back fine . His doctor cant work him out and is trying to get him into hospital for a few days for more test . He just seems to keep goin back wards in everything and i know he has global development delay but dont no what else . Just gets so upsetting at times . He can sit by himself now but this is starting to get not as good , he always smiles but thats about it . I adore my son but i feel like i've let him down by not knowing what is wrong or what his life will be like