My son's case is worse than yours. He cannot say ABCD or 1234. He can just produce sounds like mama or papa but doesn't know the meaning. He cannot respond to most instructions from adults.
So i think if the health clinic does not refer to the doctor, your case should be alright. If you are really worried, you can see the private 兒科醫生 like 仁安醫院。But it costs several thousand dollars.