Lupron and menstral

I'm 21 years old and was treated for endometriosis back in August of 2004. I started my Lupron shots one week ago because my endo., has already returned. Even though it's only been a week, I've aleady started feeling the side effects. I started feeling extremely tired, weak, and I've had severe nausea that started a few days ago, not to mention migranes. Are these normal side effects of the Depo-Lupron injections? The day before yesterday I stayed home from work because I felt weak, severe cramping and nausea. Yesterday when I returned to work, I had to come home early because I started vomiting and couldn't stop. Today, I'm back at work, I haven't been vomiting, but still have headaches, and nausea. I know I'm not pregnant because I just had a heavy menstral last week and I even took two pregnancy tests early on to see if I was and both tests came out negative. I just got married 3 weeks ago, so my poor husband has to put up with all of this, but he's been really helpful and supportive. If I decide not to continue on, will it hurt anything? I don't want to keep going on like this.