soft painless lump behind ear

Hi,

I noticed a couple weeks ago that there was a small rice-like bump behind my ear lobe. I kept massaging it hoping it would spread and go away, but it got a little bigger and split into two-conjoining bumps. It doesn't hurt, but if I squeeze it, it is like a mixture of soft tissue and cartilage that can shift slightly. Just yesterday I suddenly got a pain in my ear that hurts when I chew or move my jaw. But I can't tell if it is just from a possible cavity, or if it is because I moved this lump. But I'm pretty sure the pain is coming from the ear and not from the jaw. I am also pretty sure it isn't an ear infection because I have had ear infections before.

Could this lump just be a normal growth? I am just worried that it is a tumor that might have spread, which is causing the pain in my inner ear.

Thanks!