Ovulation on CD 29 or 30?? Possible?? Anyone??

Cynthia • TTC #2
Is it possible to ovulate on cycle day 29 or 30 for a less than 35 days menstrual cycle? Anyone experienced this before? My bbt chart seems so suggest my ovulation had taken place on cycle day 29!!!
​I thought I've ovulated around CD21 but that is not evident my substantial thermal shift...DH travelled yesterday.... All efforts during the "fertile period" predicted by apps are wasted:( Boo hoo...