Hrt ... bleeding

ive been using everil conti hrt patches for 10 years, im 64 . And ive just exprienced vaginal bleeding , and pain , like a heavy period .
i had been using only half a patch twice a week , because of availability … but for the last few months ive been using a whole patch twice a week …
this is my fist bleed for at least 7 years !!!
is it because im having too much hrt ?