Hey Bek,
I experienced ovulation bleed like you described (or some sort of bleed midcycle anyway!) after I miscarried my bub. Sometimes after a pregnancy (and mc) your body starts doing different things because I never had it before either!

If it helps you at all, this cycle I O'd on CD12, BD on CD11 and then had little bleeding on CD14 or so. Then by CD18 I had started to bleed lightly again, but it started easing off by CD25 (when AF is usually due CD26) and I got a BFP that day too. I *think* it is possible to O twice, but I'm not 100% sure. Perhaps do a search on BB or google it!

Hopefully your little body is up to something in there