They say the LP should be between 12 and 16 days so as long as that is about right for you then don't worry i usually get AF 13-14 days after i O but if i O on day 11 my cycle is shorter Af will show day 26 i have been doing a BBT chart and even if i O on different days AF always shows up 14 days later and my cycle the last few months has been 27 days 28 days and 26 days so i think i O earlier from one ovary and a day or two later from the other ovary how strange our bodies can be.