Breast lump?

Hello, just wondering if anyone has any advice I’ve had a small pea sized lump on the outside surface of my breast for a few weeks, i thought it was a spot or pimple of some sort but it’s not going away. Doesn’t hurt or anything, would this be worth getting checked i don’t want to look silly going to the docs and i thought that lumps would be inside the breast rather than on the surface is that right?