ovulation

I recently got off birth control and had the first period . I haven't been tracking O because I know it will be a little off due to the change so I am wondering ,my calendar said I was gonna O the 23 which it was Sunday but I didn't feel anything ,monday came and I had a bit of pain Tuesday as well but it was mild but I did notice on Tuesday late noon I went to pee and I saw pink ,like that break thru bleeding you get when you ovulate ,so I'm wondering if I should put in the calendar that I ovulated on Tuesday???? or if it was something else