Doctors.

So I've never been too the OB-GYN, my mom never really talks to me about this sort of thing. I'm 18 so I've had my period for a long time now and really no issues. But my sister in-law said I've should have had check ups and other things and I'm wondering if I should... A few months ago I had a issues so I went to the doctor for it but they said since I'm not sexualy active I shouldn't worry.