I agree. Your charts look really good. I would consider opks like Heather said. The Oct chart shows a l lot of bd'ing. Perhaps a little too much. The rule of thumb is every other day until pos opk the each day until o is confirmed. The Oct cycle didn't really give dh a lot of time to replenish the swimmers. But, for just coming of of Nuva Ring, these charts look great. Some women have a time getting back to normal after stopping it. Keep us posted!
Dont be so anxious, 3 months is not that long. Depending on your age, you can try up to one year if you age is not more than 30 years. If your age is above 30 years old, you should try up 6 months. If you dont get baby after 6-12 months, then only you need to see a doctor.
For the time being you dont need to worry for your reproductive health.
Nowadays, the science and technology are advancing.You can have your own healthy baby anyhow.
It looks like you're ovulating, so that's a good thing. The December chart is a bit hard to interpret right now, but it might be easier once you get a few more temperatures charted. As for not being successful, try not to worry too much yet. It can take a normal, healthy couple up to a year to conceive, so three months is not that long. Hopefully it will happen for you soon!
The fact that you're charting is great! It will really help you better understand your cycles. Once you get a good idea on how long your cycles are, you could also start using OPK tests (Ovulation Predictor Kits) to help determine when you're about to ovulate and time intercourse based on that.
Best of luck!