How can I get INSURANCE'S to give me the medicine I need?

I was with BC/BS for years. I became a DIABETIC in 2010 . I went to a special Dr. just for that . She gave me medicine and it started to come down ,but got sick on it . I was in about 7 year on a lot of different medicines .She put me on VICTOZA it work it was the only thing together with metifoman it work well . Now my insurance change and the NEW insurance wants my A1C back to 7.0 or high to let me have it . But I'm not a new diabetic I've been sense 2010 like I said . My Dr. put in so may thing I'm trying so hard to keep it down but now all I'm taking is Metiforman . Can I find out something a lot of medicine make me sick and very sick at that . Together VICTOZA AND METIFORMIN are all I can take but They are fighting with the Dr. and I can not fill it . with out paying for it I can't afford it but I have PHP INSURANCE now .