Menstrual cycle

Should I consider my menstrual cycle irregular if 2 months are on the same day but next month it’s before or after that date? Sometimes is on day 26 and again next month day 26 and next month 21 next month 23 and next month 29 then back to 26! The internet is so overwhelming and confusing and has made me unsure if my cycle is regular ( I’ve never missed a period and I’m 38 yrs old) I know that if a period comes early like day 16 only very sometimes that’s normal! Please help me and stop me from worrying?! Thanks