We didn't get a cerebral palsy diagnosis until age 7, so although I know your thread title sounds odd, I understand what you are saying.
I'm guessing everyone is just saying developmental delay at the moment, which is really hard, as it simply means no-one really knows and are adopting a wait and see approach, and you can't go and explain to people what she can't crawl, pull up, speak...so it makes it really hard for you to be out and about,neither other children the same age...is that what you mean?
If she has motor delays that are affecting her development, and she isn't hitting milestones, I'd be getting referral to a paediatrician/neurologist perhaps as it is them that do the diagnosis, not the physio.
I'm sorry that you are having this uncertainty, I can empathise and it's not nice x
Oh, I have 12 year old that drops stuff all the time, falls over regulary, and generally finds day to day stuff really tough, but she won't ever be useless, and or any of those things to me...and she has a razor sharp wit that is terrifying! Lol
Eventually, and it took time, she stopped being my dd with CP, she's now my dd...and it's all part of who she is. Xxx