irregular periods??

Mrs. B
Hi! I came off the birth control pill after 10 years in October. Since then, my periods/cycles have been 33 days, 27 days, 31 days, 29 days, 26 days. The length of all is the same, some months I have cramps, some I don't. Generally my periods are mild compared to horror stories from friends. 
Do you think this is regular, or would you classify this as irregular? Trying to decide if I should talk to my doctor or not yet... or if this even means I'm irregular. (we're trying to conceive and haven't yet).