Hi Beanybub,
I am going through a similar thing I have had 2 cycles since coming off pill (in June mind you, took her some time), first LP was 6 days, second was 9 days. I think it does take some time to adjust after the pill I have read that a short LP is a common accurence after pill use. Apparently vitamin B6 helps, I just started to take it this cycle so hopefully it helps me reach that extra 3-5 days. Good luck!