Paranoid or Rightfully concerned?

So, I have been with my boyfriend for a little over a year now. July 5th is actually our anniversary, but anyone since the beginning of our time together we have always talked about having children together, not right away but within the next few years. Now, in this year that we have been together we have had lots of sex. We have never used condoms or birth control, he just pulls out when I am ovulating. Now that I am thinking of it, and all of the things I have read "the pull out method will get you pregnant!" But I have yet to become pregnant.. I'm very scared that I could have fertility issues, I was having a thyroid issue but have since had medication for it in the last few months. Could that have been why I didn't get pregnant? Or could something be seriously wrong? Being a mom is something I want more than anything and I would be crushed if I couldn't have any little babies of my own. I don't know what I would do, I only 19 years old. Am I right to be concerned? Or since I wasn't really tracking and trying, is it normal? Am I just paranoid?

Please help..