I have a thickening in my breast which, after two ultrasounds and a biopsy turns out to be totally benign. I have had this for 4/5 months now and the consultant said that it wont disappear in a hurry either. She did also stress that I should go back immediately if I felt anything different or any changes as you cant attribute it to the same thing without a proper examination. What I am trying to say is that although it is probably nothing to worry about and might even be the same issue as you had last time, you really should go back and get it checked out.
Best of luck. xx
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