TTC baby #2

8 year ago, almost to the day, I got pregnant on my period. My fiancé and I have been trying for 6 months now and nothing. I don't do opk's cause I have an irregular schedule and it wouldn't ever be accurate. 
But if I ovulated right after my period then, should my body still do the same now? I feel like this is a dumb question. But I honestly don't know.