Ovulating

Is it possible to ovulate while on your period? Like at the end? When I used to be on BC I waited till I stopped bleeding to have sex so it wasn' gross. Now Glow says my period is supposed to be done tomorrow but it is still really heavy. I know I can adjust my period in glow if it goes longer, I just don't want to miss my window of opportunity. My husband is open to doing it in the shower if I want.