My son is 2 yr 10 months old & he is not properly talking. He speaks only single words. Can you suggest me what should I do?

Speaking from my personal experience, my firstborn does not speak at all until she is three and a half. Prior to that, she only call papa, mama and milk but understand everything we told her. I was told she might have speech delay as all her peers was talking non-stop at age of two. I was so worry at the negative comments by other people but my husband assured me and ask me to give Hee space/time to develop at her own pace after some of our own research to rule out that she has speech delay. One fine day, she start talking and she speak in perfect statement: "Mommy give me the milk". It turn up my girl is a perfectionist like me and only talk or do stuff that she can do perfectly if not, she will just observe other. Today at the age of four, she talk non-stop the moment her eyes open; we often joked that she is a music player with the spoilt "stop" button.