What do you know about infertility? ...?

I've been in a monogamous relationship for 6 years, have never used any form of birth control except withdrawal. I have never been pregnant or have tried to have a baby. Infertility does not run in my family. I take annuals every year and my cycle is completely normal. I'm not ready to have a child now, however, when the time comes I want to be able to have children. However, I think it is strange that out of 6 yrs. of no birth control it has been effective, when people around me having casual sex with others mistakenly get pregnant all the time. Am I being paranoid from the fact or should I be concerned that I have not gotten pregnant by mistake? Or maybe I should just count my blessings and be glad that I've consistently had a lucky draw?

Lucky maybe? But I would suggest getting a work up complete by your obgyn. I would share your concerns with your doctor and they would be able to walk you through this. Your obgyn deals with questions like this everyday and can be an excellent starting point. With that said there are some common problems that affect fertility.
Most likely it is pure luck but it could be male or female infertility.

A few simple blood tests can assist your doctor in evaluating your hormone levels.

It could be female related some common problems are:
Endometrisis
Pelvic Inflammatory Disease
Tubal disease
PCOS

In addition, it could be male factor infertility which again is a simple test of the sperm quality.

There are lots of things to consider but at this point I would not start to get worried about anything. Just ask the questions and let your doctors do the work. Continued Good LUCK!!

if you are truely ready for a child, go to your primary care provider and ask him/her to run a thyroid panel on you. your thyroid could be too high or it could be too low.

keep a record of your cycles. if they are like clockwork each month, then on days 13, 14, and 15 after your first day of having your period are your most fertile days. if i were you and you despirately wanted a child, then go to the "Dollar Tree" store closest to you and buy an Ovulation Test. (the dollar tree would be the cheapest place to get those. they are only a dollar whereas if you go to walmart or elsewhere you are looking at approximately twenty dollars or better.)

i would even go to your ob/gyn and have a consult with possibly getting a fertility pill. (clomid)

good luck!

Fertility issues are just as likely to be the male's problem as the female's. Since your cycles are normal the assumption would be that you are ovulating. So, perhaps your partner has a low sperm count or something. It's very easy for the male to be tested - totally non-invasive; this would be a good place to start. Talk to your doctor on your next annual to find out her take on it as well.