There really aren't any further tests that would tell you anymore than you know now. Evidently it was discovered that you have Fibrocystic Breast Disease. These cysts do cause pain and they do get larger and then smaller. You should certainly have a discussion with your Physician to ask some advice as to things you can do to improve your situation. These cysts can be surgically removed if they become very bothersome but they are usually just left alone and watched as recommended ... every 6 months. Regards .....
Hi if you are worried about this you should go and have a chat with you Dr, Trust your own feelings on this and have it checked again.
" I believe that no one knows you, like you know yourself "
i hope it all goes well for you
spookey