It sounds like you want to take a natural approach to this. Holistic treatments may help without going through the trouble of determining the cause of your infertility.
First, you want to be sure that you are ovulating. Even if your periods come regularly, you might not necessarily be ovulating. Taking Charge of Your Fertility is a great book to learn all you need to know about charting your cycles and your own fertility signs. Once you know when your fertile, timing sex is easy (though not always convenient!).
We struggled w/ unexplained infertility for 5 years. I had many tests and treatments done, but nothing worked. Eventually we decided to adopt. Wouldn't you know, I got pregnant the week before we left for Russia to adopt our first son! No, I wasn't relaxed - it was the most stressful week of my entire life. No, I didn't "stop thinking about it" - getting pregnant was constantly on my mind. But I did have something else to focus on. Perhaps that helped? Or perhaps God just had His own plan for us?
Now we've been trying for another child - it's been 3 years and no luck. I'm not doing any treatments this time. Even herbal remedies were too much. I've decided to leave it in God's hands.