Hi there. I possibly o'd on the 22/23. I was on BC until January 10th and had my AF the 12/13. I was only on BC for a few months so I am pretty sure I ovulated, but not 100%. DH and I did the deed on the 23/24. IF I ovulated, calculator says 20-25. I have no idea the likelihood of a BFP since I was on BC for a bit. At this time I have major lower back and abdominal pains. DH noticed 1 breast slightly larger and lower then the other last night but there is no pain at all.