I'm fifteen years old.
A year ago I discovered a small lump on my left breast. Now it's a year later and I don't think the lump has grown but I think I have another lump of the same kind on my right breast.

The first lump I found is:
-around a centimeter above my nipple
-small (no bigger than 2 millimeters or so)
-not visible except for a tiny bump and appears slightly red
-can be felt underneath the skin
-moves slightly
-has a dimple when pinched

Also I had slight pains in the same breast but I'm not sure if it's just my mind playing tricks on me.
Is this worth getting checked out? Please help; I'm kinda worried.