Ha e a question

So I go see my doctor tomorrow I am usually. A 27 cycle but after my miscarriage in July I just started my period on Nov 17th it was 7 days long so I have. Been waiting g for my Dec period it just came today I added it up and it is 42 started from the Nov period so am I go III mg to be irregular now and hkw do i go by seeing when I ovulate again do I test 2 times a day soon as my period is done plz help I'm just about to give ul