Lupron

Hello Dr.
After my 5 weeks of external radiations, follow that a 2 Bracky therapies as internal radiations. I took my 1st Lupron shot of 30mg as a continuous treatment for my prostate cancer, now I am past due on my 2nd Lupron shot. I lost my job; the new insurance is not covering the Lupron short? I was told that I suppose to stay on Lupron for 3 years in the row.
Is there is a dangerous for not taking 2nd shot on the right-on-time, already 1 month behind? And perhaps if I discontinue, are there is a dangerous on me? (Since I can’t afford to buy the Lupron), and is there another drug I can get, in order to get the same effects as Lupron, bout more affordable?
Thanks very Much Doc.
Kindest Regards
Zak1763