I had surgery 4 yrs. ago for endometriosis afterwards I began a yelow/orange discharge and continued blood spotting which often is more then just spotting. I have had 2 biopsis, ultrasound, endioscopy, there is a fluid in my uterus which no one seems concerned about. I'm concerned. The spotting has becme more freguent & heavier. Can one have another surgery for endometriosis?