[Lorelei]

When (and whether or not) your boobs will grow pretty much depends on how healthy you are and your family history.

Since your periods are still irregular, it may be that your body hasn't adjusted to the hormones yet. If you're underweight or if you're really into athletics, that might be a part of it. Other than that, it's a genetic thing. Some women just have smaller breasts and that's perfectly fine! In fact, my sister-in-law prefers to have smaller ones because larger ones can get cumbersome, and my brother (her husband) likes them just the way they are!

If it's something you're really curious about, your best bet would be to ask your doctor about your health and weight the next time you have a check-up. If it turns out that you are underweight or do not have enough body fat to be healthy, asking them how to gain weight could probably help you.

Just remember though, there are upsides and downsides to everything. Big boobs really aren't that much fun when you get right down to it, and there are a lot of guys (and gay/bisexual women) who like smaller breasts as opposed to larger ones. Don't stress about it! Enjoy what you have.