I went thru those exact feelings when we were ttc Ashleigh. It took us 16 months, luckily for us we did find a problem that was easy to fix.

Was a very hard time, I always like to be in control of my life and this was one area where I felt I had no control, didn't matter what we did wasn't working.

Considering that all your tests came back fine maybe it is a matter of time. I remember reading somewhere that even healthy couples only have a 25% chance of conceiving each month.

I can't help you much on why your cycles have gone funny, maybe try vitex? Its a natural drug that helps regulate your cycle and helps stimulate the hormone that is involved with ovulating.

I would say relax but I know its easier said than done, maybe try get away for a break just the 2 of you?