Ovulation /period (ttc)

an

Can someone give me advice .. so my periods are all over the place and I'm ttc for around a year now with no luck can anyone maybe be able to tell when I ovulate

My periods:

September 2019 7th-10th

October 2019 13th-17th

November 2019 12th-16th

December 2019.. MISS..

Jan 2020 26th-30th

February 2020 ..MISS..

March 2020 26th-1st April

May 2020 1st-4th

June 2020 25th-29th

July 2020 still waiting