Help advice on ovulation!

Hi ladies!! We’ve been trying to conceive baby No 2 for 2 months (this is third). First baby was conceived on the first try so I am obviously a little disappointed now trying to not overthink it. Since giving birth (period restarted in October after breastfeeding) my periods became longer. They’re still regular but longer - went from 29-30 days to 30-34 days. Last month I did an ovulation test and had solid smiley on day 19. Today is day 19 and still nothing. Started getting a flashing smiley day 16, ran out of those and accidentally got the wrong test that just shows the O or ☺️ so have been taking those and just getting solid Os (even today day 19). I called my OB she’s currently in delivery so couldn’t answer so I’m bringing it here - is it possible to get an O on 19, and still ovulate on 20-21? Is it possible to ovulate on 21? Last month my Lutéal phase was shorter than 14 days (it was 11 days). Any advice would be helpful as I think last two months we just kept missing ovulation as I was going off of my pre baby cycle and trying too early or too late! Really want this month to be it 🐥🤞