Breast Lump

so about two months ago i went to my doctor because i had found a lump in my breast, after she examined me she told me i was fibrocystic and that the lump should go away after my period that month. then around the beginning of my period it began to decrease in size so i figured it was going away, so i paid no attention to it. But here i am two months later and i can still feel it and some days it’s bigger than usual or sometimes smaller. Of course i know i am dumb for not paying attention to it more, but i need opinions. Should I go back after my period so I can say that it’s still there after my period or should i go now?