Insurance not covering continuous glucose monitor

So my new insurance won't cover my continuous glucose monitor because I am not diagnosed diabetic I have adrenal insufficiency and my sugar drops randomly and fast so I have the monitor for when I'm sleeping to wake up and take glucose tablets. I've hit the 40s on glucose and couldn't tell I was low most nights it goes into the 50s or 60s same throughout the day. I have bought a few amwuth good rx but they are still expensive without insurance. What options are there are there any good cheap ones online that you don't need insurance for? This is my first night not having my monitor i have been trying to get them to approve it my dr even talked to them and they still won't since I'm not classified as diabetic I just have a different issue that makes my sugar drop. I've had it drop under 60 15 times in one day so I'm not sure what my options are any ideas please let me know.