Need help please

I m ttc from one year n my family Dr told me that I m not ovulating n maybe I m having pcos but last week I visit first time to gyn n she told me that I m not having pcos bcoz I hv no symptoms of that. my periods are regular n but I hv very light periods not every month but sometimes very light like this month n remain 4 days so u think ladies?is this normal?or its because of not ovulating, ?anyone experience this?