Does my menstrual cycles sound Regular or irregular? If not please help me calculate them!

I been using Glow, Ovia and Flo period tracker. My length cycles each month comes and goes! Sometimes its 32 or 33 or maybe 40. 

I bleed usually 5 or 6 days. I don't know if my periods are Regular or irregular. 

I'm having hard time trying to figure them out so I will know what to set those period tracker cycle length as.

I had csection July 14th 2017

Here is a list of my periods since childbirth.

September 3,2017

October 5, 2017

November 7, 2017

December 5, 2017

January 2018- No Period!

February 3, 2018

March 9, 2018

April 6, 2018

May 17, 2018

June 2018-No Period!

July 8, 2018

August 12, 2018

September 2018- No Period!

October 17, 2018

November 2018- No Period!

December 2, 2018

January 3, 2019

February 10, 2019

March 14, 2019

April 2019- No Period!

May 1 2019

June 4 2019

July 2019 No Period 

August 7 2019

September 2 2019

October 11 2019

November 11 2019

December 28 2019

January 2020- No Period! 

February 22 2020

March 24 2020

May 3 2020 

Does these sound Regular cycle? Help me calculate them

Answer