Son is 2 next month.
Long story short, i’ve suffered with anxiety since he was born as it took years to get him, I always feel like he’s too good to be true and that something must be wrong 
I’ll start with saying what his strengths are - his speech is fine. Loves nursery rhymes and knows loads of the lyrics. Can count to 10 and knows the alphabet (This will definitely be because of little baby bum
) He repeats words, shouts his big sister by name, mama, dada etc...
Walking to nursery today he saw different objects and said the ones he knew by name (Flower, leaves, tree) His voice is quite deep and his pronunciation isn’t 100% but I think his speech is fine, I don’t really have concerns there.
Loves animals, makes all the animal noises and says what they are. Knows his body parts such as head, eyes, ears and mouth.
What my concerns are is that he has always been later with milestones. His sister was always ahead. I know every child is different but he always seemed to make them in the nick of time of what was considered “normal”
His understanding is hit and miss. If I ask him to drink some water for example, he will. If I ask him where a certain object is the knows, he will reach out to it rather than point to it. If I ask him to bring something to me he often won’t. It’s like he only listens when he wants to (He is waiting to be seen at ENT as one ear is blocked with wax and his sister had glue ear as a toddler so I wanted to have him checked) Basically his understanding seems a bit hit and miss? But he does definitely understand some stuff.
Pointing - he rarely does it. He can do it, and he does it sometimes, and started just before turning 15 months old, but as I say he doesn’t appear to be a regular pointer. Sometimes he will point at something he takes an interest in, but often he reaches out to it instead.
He likes other children, enjoys nursery and he likes to pick items up and pretends it’s a phone, saying “Hello” So I’m happy with that, but my biggest worry is that he walks on his tip toes a lot. He doesn’t do it all of the time, he will walk flat footed in shoes, but in bare feet and slippers he walks on tip toes. He does occasionally tip toe walk in shoes, but can also walk flat footed in them.
I would say though that at home he’s mainly always on tip toes.
Sometimes when he’s excited he flaps his arms. I thought it was usually when he wants me to get him out of his cot or high chair, but i’ve noticed tonight he’s done it when excited at something on TV. He’s had no nap today and is overtired and he seems to be doing it a lot this evening. He’s been running around flapping his arms and tip toe walking, so of course my mind has run away with me.
Please be honest with me, are there any red flags here and do I need to look at private assessments/speaking to my HV?