The lab technician told me that they were most likely blood
cysts from endometriosis. She said that it was pretty common
and not to worry about it.
I was however on the pill the pill at the time and therefore shouldn't have had them as I hear that the pill is one of the way to treat this condition.
My cysts were not followed up since.
About two months ago (I am now close to 36 y.o.), during a routine pap smar, I asked my doctor if it is possible to check on those cysts.