Irregular Cycles - Conceive without meds?

Anyone conceive without meds with irregular cycles? I always have different lengths (ranging 28-44) and never seem to have a similar pattern. And I really only see one month with a clear ovulation spike. The only thing consistent is my period length is always 5 days. This chart just shows temps and lengths. The lower lines on this chart are before I started temping. I also keep track of OV tests, CM and Cervix height, which is also always inconsistent and I hardly ever get fertile CM or a really dark OV test (sometimes never even at maybe positive test). I'm not overweight or underweight, I eat 90% healthy food, light exercise (could do more) and blood tests came back normal five months ago (thyroid test and some other things all normal). Doc wanted me to wait a few more months to come back for aditional tests. Will schedule my next fertility appointment in April. Wishing I didn't have to... :(