+ OPK but... did I ovulate?

So this morning my BBT is up from 96.9 to 97.6 I had a positive OPK yesterday with ewcm the last few days. This morning my OPK still seems positive too...I have two questions 1) can the surge last longer than 24 hours? 2) is ovulation happening the day your temp drops or rises?

Thanks ladies!

** This was my OPK this morning 👇🏼yesterday’s test line was as dark as the control line.