Areolas form a puffy mound above my breast, and I have flat nipples. Is this normal?

I'm a 16 year old female with 36A breasts. They have always looked this way ever since I started growing breasts, around 12 when I had my first period. My areolas form a separate mound above my breasts, and it's like my nipples are non-existent. But it's only this way in their relaxed state. When I'm cold, they seem to look like "normal" breasts, but the areola still appears a little puffy, but not as bad as when they are relaxed. I'm not sure if they are still growing, or just like this. Help!