Hypothyroidism/Hashimoto's

I was just diagnosed with Hashimoto's a week ago. Hubby and I have been trying for over a year. My periods were pretty regular up until this July. I had one cycle over 4th of July and the next one didn't occur until Sept 22nd. According to bloodwork {by sheer luck} I ovulated the day I had work done. So....my long winded question is how is the best way to catch when I ovulate since I'm anything but regular? I recently started temping, and I have purchased OPKs. Any additional recommendations?? I also need a serious lesson on how to read and make sense of my charts! Any takers???