Period?

So I’m 21 years old, I had my first period when I was 12, never was regular. When I turned 16 my mom put me on birth control, I was on it for 3 1/2 years and had a half way normal period. I quit taking it when I got married and then this past December I started it again until February and then quit them again and yet to have a period since. I’ve been to my doctor and she acts like that’s not a problem? But I believe it is especially since I’m wanting kids? Just curious if anyone else has had this problem and how you’ve managed it without birth control