I am scared...

For 5 months, I get my period every two weeks. 15 days exact. They are light. Last only a day or two. So, I went to the doc and she did blood tests to check progesterone and estrogen levels, all normal. She also checked my thyroid. Normal. So, she referred me to a gynocologist. I am just so scared that something is seriously wrong to where I will find out I can't have a baby. I wish I could be like my mom and be a fertile mertile but no it is not like that for me. :/