Sorry it took me awhile to get back to you my son is really into crawling and banging on the keyboard recently and my mom needs me to help me keep an eye on her blood pressure.
If your period isn't working still I can give you some help.
Most of my solutions are herbal cause last time I tried to get pregnant the NP wouldn't help me at all.
If you notice that changes don't happen it means your probly not ovulating. But sometimes it's just a lack of change in the cervix if that's the issue I've used evening primrose oil tablets,they soften the cervix to make favorable.
I've heard it's more effective if you combine it with charting your temp but I've never really done it.
Oh and the cervix should change so that it is higher and softer.