HELP different cycle length every month!

Naomi
Every month my cycle length is different! I'm curious how I'm suppose to get pregnant. If my period is irregular than surely my ovulation must be too?  Here is my cycle days the past few months ; NOV: 41 day cycle DEC: 29 day cycle JAN:30 day cycle Which was my last period 19th-24th January. It is now March and today would be cycle day 44 !