I went to the DR after not having a period for four months and BOY AM I GLAD I DID! I didn't know what was wrong and I was too nervous to tell my OBGYN but finally I got up the courage and went in about a week ago. Not only was he COMPLETELY understanding of why I wanted children at 20, but he prescribed me provera to start my period and is starting me on clomid once I am done taking my provera (only three days left!!). SO for me, going to the DR was well worth it.
if your DR is a good one, he will help you out. That is, afterall, what they are there for.