HRT and breast cancer

I was on HRT cream for 6  months when I had a bad reading & was told to attend John Hunter Hospital in Newcastle for more exhaustive tests - they reckoned it was the testosterone component in the cream that gave the abnormal breast readings..... I stopped taking it the day I got the callback & 4 weeks later, the next screening came back 'normal'.  That was about 10 years ago.  Then my GP found the lump in Nov '17 .....