Different symptoms in early pregnancy

So if every woman experience pregnancy different then how do we know what early pregnancy symptoms are? If it's not very normal for them than could it be a possible pregnancy symptoms? Online they give you a list of symptoms that could happen in early pregnancy but I'm sure that list was made but how common it is to get that symptom. I guess what I'm ranting about its I see some woman shamming others because they ask if something could be an early pregnancy symptom. I see the "smh" and the "really???" comments. So how do they really know that "this" is definitely not a early pregnancy sign for them? I secretly hope that these women that asked the question are pregnant and post a BFP picture just to show them that it might have been a sign for them.