Trying to conceive

So my husband and I have been trying for about 8 months now trying to conceive. My periods were staying between 28-30 days. Not sure if I was ovulating or not. Now the past 3 cycles have been 36, 42 and right now I’m at 35 days without a period yet. Not sure why this would be changing so dramatically in the past 3 months. Anyone ever had this happen to them? We are already struggling to conceive so I’m not sure if this is a sign of more complications