I had intercourae on Jan 30, at the tail end of my period (CD 8, I still had some dark red spotting in the AM, which has tapered off to
light spotting by end of day). I still had some
light brown spotting on Jan 31. On Feb 4 midnight, I had quite a lot of clear, watery stretchy CM when I went to the bathroom so I suspect that I was ovulation then. I don't track my temp and have never tried checking my cervix, so mucus is my only reference.