How do I make a doctors appointment

I have missed my period for a month now and getting negative test, and I want to go to the doctors to see what’s wrong with me. I haven’t been to a gynecologist ever and how do I set the appointment when I call? Do I ask for a basic check up?

PCOS runs in my family and I guess I want to see if I have that or endometriosis can they check for that do I ask them when I get there or to I tell the schedule lady??

Please help! I don’t have any lady’s in my family that can really help me with this I’m kind of lost 🥺🙏🏽