I take a non estrogen BC pill, and only get my period when I forget to take it. I have only forgot to take it once in the last year (Christmas Eve lol) and have only had 1 period in teh last year. I went to my Dr to get another prescirption and ended up seeing the PA. She said it's completely normal not to have a period on this type of BC, but I have to remember to take it at the same exact time everyday.
It's what they gave me when I tried to nurse, I think it's called Jollivette? They either called it a low dose or a non estrogen pill, and I remember it was specific for nursing moms. I have continued to take it, even though im not nursing, because there's no side effects for me (I had horrible side ffects with other BC pills).
Good Luck! Have fun!