Teri
You're doing most of what you can do - you just have to give it time. I know that can be hard. By charting you mean taking your temp right? Are you also doing ovulation prediction tests? I charted my temps, checked my cervix and cervical fluid, did OPKs, took mucinex starting a few days before I expected ovulation, and made sure we had sex on the right days. I also took the herb vitex which helped raise my progesterone levels (I have a short luteal phase) and used a lubricant called "Preseed". It is the ONLY lubricant that is made specifically to help conception - all other lubes kill sperm. Preseed mimics fertile quality cervical fluid. Definitely get your hands on some preseed. It is expensive but you only need to use it around ovulation.
It took 4 months conceive my son, 1 month for my miscarriage and 2 months for my daughter. I should mention that I was also taking progesterone for my miscarriage and my daughter because I had a very short luteal phase at the time (only about 6 days - you need at least 10).
Have you read the book "Taking charge of your fertility" by Toni Weschler? It goes over all the charting stuff but you might also learn some new stuff. The book was a HUGE eye opener for me.
Good luck!