Emotional Vent

I am a mother to 3 boys. Their ages are 12, 6 and 2. I am also currently pregnant due March 23rd. I do in-home childcare for work and I work 6 days a week 12 hours sometimes more a day. I had a parent today (going to school for child behavioral therapy) or something like that, ask me if my 2 year old has started talking yet. He mimics some words and does a whole lot of babbling but no consistent word phrases. He can sort shapes, colors, numbers, he points to me what he wants, he understands what I say to him and he, at least to me is very smart. She mentioned that I should have him evaluated for delays and seek out treatment. I had already brought up to his pediatrician about his speech because Dad was asking when will he start talking... the Dr told me he is just fine. Hearing is perfect and he showed her signs that he is on cue. The mom kept insisting that I need to get my son evaluated and maybe its the pregnancy hormones but I'm crushed that someone would that drastically try to put my child down. She rarely ever sees him so I found her comments really inappropriate. I just feel like I'm doing a horrible job as a parent. My older 2 are straight A kids so I felt like I was doing something right.... I'm just in tears because I try so hard and do so much 😭😢😭