Cycle Day 9 OPK

Christina • Mommy of 3

So I have a question. Will I always ovulate on the same cycle day? last time I got a positive OPK it was cycle day 11-14 . Today I tested and and my OPK was positive but it's cycle day 9. So I am wondering if this can be correct. I am using first response non digital OPKs since I prefer pink dye over blue.