the fact you know that you had a partial hysterectomy means you were told.
in a partial hyst the cervix and a very small amount of the lower part of the uterus are left behind.
it is possible for there to be some endometrial tissue left in this "pocket" and this can be effected by the hormones produced by the ovaries.
A complete hysterectomy is when the entire uterus and cervix is removed and the top of the vagina is sewn together as a "vaginal cuff".
You really should have seen your surgeon about this when it was just some spotting as it may have been "cured" at that point by a simple silver nitrate treatment.
it sounds as if the endo tissue has now grown more - possibly extending into the cervix.
your surgeon should be able to put it right.
for the record removal of the ovaries is nothing to do with a hyst - not even a complete hyst.
removal of the ovaries is an oophrectomy (bi-lateral oophrectomy is when both are removed).
salpingectomy is removal of the tubes.
the procedure you are thinking of - where the uterus, ovaries and tubes are removed is a hysterectomy (complete or partial) with a bi-lateral salpingo-oophrectomy.