Are The Cluster Of Cysts In The Breast Normal?

I had four mammograms and an ultrasound on my breast done all in the same day. They did them because they said they saw a cluster of cysts. However, they now say not to worry about the cysts and they will redo a mammogram in six months time to recheck everything. my mom had breast cancer twice is it normal they are making me wait six months to recheck the cysts. ?