How long do I have to get this Lupron?

I have to get a Lupron injection once a month to stop my body from producing estrogen.  My particular cancer is estrogen positive, which means the more estrogen in my system will cause the cancer to grow that much quicker.  However, it basically makes you body start having the symptoms of someone going through menopause.  Yes, it's really is nice not to have my period anymore, but the hot flashes are all the time!

I took this picture one hour after having my 2nd one.  I don't know if you can really tell how red my cheeks are in this picture.  I feel like I am going to combust all the time!