Irregular cycles and ovulation

So some months I have a regular cycle and every now and then I will have a longer cycle (a regular cycle for me is average 30 days). I had a miscarriage back in March and I feel like my body is entirely thrown off lately with as much as a 44 day cycle and I am having trouble determining when I ovulate. I have several of these apps and they're all always off by a few days which is why I take ovulation tests. Should I just start taking them every day in case I am ovulating abnormally? I have been TTC for 9mos now and aside from the miscarriage, no luck. I have been recording my bbt and cervical mucus the whole time. Taking any other suggestions :))