I am 48 years old and had a hysterectomy in 2000. I have been very poorly for coming up a year and have had various procedures to determine what the problem is. I had a colonoscopy which the endoscopist queried endometriosis. The consultant has prescribed Zoladex for the initial period of six months and I had my first injection in my tummy four days ago. The initial injection did not hurt in any way but as time went on that day the pain was unreal. I do have a nice big bruise as well which I suppose is only to be expected. I am hoping that this is going to work but I would just like to know how long this takes before the pain starts to disappear.