First off,

and I'm excited for you starting to TTC!
Second, it doesn't look like you've Od quite yet to me....when did you go off of the pill? The pill regulates your cycle, so it will always be just about the same.
Just because you haven't Od yet, or that you will O late in your cycle doesn't mean you will haev a short LP. Some people have short LPs and have no problems, some people do have problems. I have to take progesterone supplements when I'm TTC because of the short LPs I have.
Have you tried using OPKs? I think they're great! Also, you might want to try reading "Taking Charge of Your Fertility", you can find it pretty cheap on Amazon.com, it's a great read!
good luck!