Breast Rash has faded but I now have to make an ultrasound appointment as I have ''lumpy breasts''. Has anyone else had the same situation?

I attended an appointment at my local breast care centre due to finding a rash on my left breast, this has faded since I had an appointment with my GP, I have now been asked to make an appointment for an ultrasound as apparently I do have "lumpy breasts"  has anyone else had the same situation, such a worry having to wait for this to take place after Christmas