my SIL was having trouble getting pregnant due to irregular periods - she went to see a chiropractor and after a few months was pregnant and now has a beautiful baby girl. It may or may not help, but it can't hurt.
As for relaxing so you will get pregnant - IMPOSSIBLE!!!! My first one came no problem, my second took over a year, not long, but was I miserable every month when my period showed up. It was the month that I decided to give up trying and be thankful for the one I had that I finally got pregnant. Pursue all avenues, you may even want to consider adoption, I know more than one person with that got pregnant after their adoption was approved! Instant family!