Changing bowel movements

Br

Ok ladies TMI but wondering if anyone has experienced the same.

All my life I've been a fairly constipated person, this month I did OPKs and hit my ovulation perfectly but my BMs have gone to very soft, truthfully it's annoying as it's much harder to clean! My diet or water intake hasn't changed so just wondering why am I so soft now? AF is due in 5 days so waiting until then to take a pregnancy test.