well cerazzette is a progesterone
only pill. and symptoms like spotting or irregular periods
are quite common with it and you need not worry.Generally it is recommended for short duration like when the baby is breast feeding as it doesn't affect your lactation
.But i think you are using it for five years. well no problem, but there are other cyclic pills which are equally or more effective and you can take and can get regular cycles.So its a option for you to consult your doctor .
take care . bye