Yeah, that's not normal. The left testicle was developed to hang lower than the right so they don't hit nor rub one another. That lump is also a dangerous sign. It could be a form of cancer starting, or it could be some form of swelling.
If I were you, I'd call your family doctor, explain the situation, and see what they recommend. They may tell you to go see them, head to a prompt care/ER, or recommend you to a urologist right away.
Yes, make an appointment to see your doctor and get checked out.