Irregular priod help?

When I was a teenager my periods were few and far between but my dr said it was normal for adolescent girls so he put me on the depo prevera shot to regulate but I only got one every 3 months when the shot wore off and I didn't like that so after a year I swiched to the pill now I am 20 I got off the pill in november and didn't have a period until late April my dr didn't seem worried about it I'm not sure if they will regulate from here or not bu t what are some natural ways I can help it do so I don't want to go back to the pill because my husband and I are hoping to get pregnant