When to take test(s)!?

Hey ladies! TTC newbie here! Been trying for 5 months. So this month my period is late ... It never is. But took a test when my period was 3 days late and was negative 😢 Now it's a week late ... Could I still be pregnant or am I being too hopeful? Is there any point taking another test...? If so when? 😳 Sorry if this is a silly question!! Thanks! X