Test for mold?

M2

I'm pretty sure the reason my baby is constantly sick is bc we could have mold. Me and my husband have both been sick too. I've taken him to the dr over 6 times and I'm getting nowhere. Has anyone tested their home for mold? What home test kit did you use? It is costly to get a professional to do it. Sorry I just dont know what else to do and he only coughs and gets stopped up at home.