Is It Safe To Take Decapeptyl Injection For Nerve Pain In Buttocks Towards Groin?

I AM CURRENTLY ON WAITING LIST FOR HYSTERECTOMY. LOST RIGHT OVARY AND FALLOPIAN TUBE IN 1996 DUE TO LARGE OVARIAN CYST. IN AND OUT OF HOSPITAL OVER LAST FEW YEARS HAVING ADHESIONS CUT AWAY. LAST SURGERY SHOWED REMAINING LEFT OVARY STUCK DOWN, MAY HAVE ENDOMETRIOSIS UNDERNEATH. FOR THE LAST WEEK I HAVE HAD NERVE PAIN IN LEFT BUTTOCK GOING INTO GROIN. I CAN FEEL THE PAIN LOW DOWN IN MY PELVIS. IT HAS LEFT ME WITH A LIMP, SORE WHEN WALKING. II RECEIVED DECAPEPTYL INJECTION YESTERDAY, FINISHED PREVIOUS COURSE OF INJECTIONS LAST FEBRUARY AND MY PERIOD RETURNED IN DECEMBER 2014. STILL FEELING THE PAIN AND STILL LIMPING. DOES THE DECAPEPTYL INJECTION TAKE TIME TO KICK IN? WILL IT WORK AND KEEP THE PAIN AT BAY UNTIL SURGERY? STILL HAVE A FEW MONTHS TILL SURGERY TAKES PLACE.