I agree with you. While waiting a few weeks is probably not going to change anything, if you are just waiting to have the doctor tell you it needs to be looked at, why not get the ball rolling?
As Lori said, 80% of lumps are benign, but you are smart to pursue this to a 100% conclusion. Don't ever "wait & see".
Good luck to you. Please continue to ask us any questions you have.
Do not go gentle into that goodnight,
Rage, rage against the dying of the light.