Child health issues and different point of views of my husband and me

Hy mamas. I’m a mother of a two yr old. My husband believes in home remedies for treating health issues e.g constipation, cough, runny nose. I also do home remedies, but for a day or two, if symptoms are not reducing I would prefer to see a doctor. So my question is when do you mamas visit a doc? As early a possible or u wait?
Also I saw one Grey hair in her head. Should I be worried?