re testing for her2 ?

HI IS IT POSSIBLE TO BE RE TESTED FOR HER2 AND IF SO HOW DO I GO ABOUT THIS.

I WAS HER2 POS AND 2 YEARS NED
WONDERING WHAT THE HER2 STATUS IS AFTER ALL THIS TREATMENT AND IF HER2 TESTINGS CHANGE? I'M WONDERING BECAUSE I READ WHERE THOSE TESTED POSITIVE ARE AT GREATER RISK FOR RE-OCCURANCE. I'M ALSO WONDERING THAT SINCE PERIODS HAVE STOPPED SINCE TREATMENTS IF THIS WOULD LESSON HER2?

THANKS-
CHERE

i didn't get an answer or response regarding this question but see a lot of views. i persisted in asking this question of on of our cancer care centers and the lady is looking into it and says it is a qood question. generally you all reply and i was beginning to feel like the lone stranger in asking this question. it is reasonable and when i do get a response i will post. thank you.