How to get periods back to normal?

K

I’m 25-30 lbs overweight (to be normal BMI) I’ve had two kids now 6 and 10. Didn’t have trouble conceiving them so I never really tracked my periods. I think they were slightly irregular but now they’ve gotten longer and longer. Used to be 27-43 days. Last month was 76 day cycle and on cd 49 with no sign of af showing up. Those of you who were irregular, and now regular again, what did you do differently? I just want a normal cycle so I can ovulate again! (Is losing weight already and taking myo-inositol) (9lbs down in a week)