I'm sorry to hear that you are out.
As for your LP... generally it shouldn't fluctuate by more than a day or so. My average is 13 days, but it's been both 12 & 14 in previous cycles. That's a normal fluctuation.
You might want to consider taking a B6 tablet along with your Prenatal vitamin. I say this because 10 days is really the shortest that your LP should be for a BFP. I take 100 mg every day because I had a 5 & 7 day LP last year. I started taking B6 at the end of April and my LP's have gotten much better.
YAY for your first full month of charting!!

You've got a great positive attitude!!