(During that time, there is less estrogen
so the endo implants tend to shrink, and
in some cases, they resolve nearly completely.)
It seems more likely to me, in view of the scant fluid in the cul-de-sac, that you have suffered hemorrhagic cysts.
As for ovca, well, I guess it could be...someone has to be responsible for those odd cases that do not fit into the normal statistical means! :) Seriously, though, statistically speaking, it is not likely to be ovca.