Question for the parents with autism children

C

Hi moms! My baby is 12 months old and her pediatrician told us that she has Autism (after months of test and specialist appointsments where all the tests cameback ok). She reffered us to a behavioural pediatrician specialized in Autism. From what I understand from a mom is that there is a big possibility that we won't get a diagnosis now bacause she is too young? So then what happens next? She needs to be seen by a behavioural terapist (i believe that is what they are called?) and a phisioterapist ASAP. Can she be seen without a diagnosis? Can somebody tell me the steps are to get help for her?