Luteal phase

Hi frnz need ur input. I am having 26 days cycle on 27th i usually start my dates with full flow. But 2 days b4 period i started getting spotting so will it be a part of luteal phase. I need to calculate my luteal phase days. I ovulated ob cd-14 this time and at 9dpo and 10dpo i am having spotting. So am i having short phase or will thr spotting be the part of luteal phase usually we need minimum 10/11 days of luteal phase fr pregnancy. I am little confused can some body help. My dates are due on 4th