When will the plateau end? Help!!

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I have been stuck at 146 lbs for 2 months now and nothing I do has broken my plateau so I would love to hear people's success with this issue. I have upped my calories, lowered my calories, changed my diet, changed my exercise routine, I have honestly done everything I can possibly think of and still NOTHING!!! I know this isn't the smallest I can go because I am only 5'5'' and was 125 lbs for a long time, so why am I stuck at 146, this is so frustrating!!!