Seeing a nurse instead of an obgyn?

Hi everyone! I scheduled my first prenatal appointment the other day (currently 5 weeks and won't be going in until 8 weeks). They told me I'd see the nurse first and then whoever is available after that. Every pregnancy book I read says the first appointment is the one where you see if your obgyn is a match. Should I be more pushy to see an obgyn or is this normal?! FYI I'm in Massachusetts. I'm so worried!