Ovulation and late periods

Ok so last month I was 9 days late on my period I'm usually every 31 days so last cycle was 40 :( ... I'm taking clear blue digital ovulation test I usually ovulate around cycle day 14- 15 and start taking the test on cycle day 11 .... Would my being late last month change my ovulation date ... I usually ovulate around the 30th to the 1st of the month I usually the days are going to change it will be 9th to the 11th maybe ???? Any one know ??? This is the 1st moth this ever happened to me