@DebraJ You mentioned a severe illness that damaged your pancreas and liver. Have you had a C-peptide test since your numbers shot up? Not only can illness damage your liver and pancreas but some medications can too.
I know steroids can damage both and some people end up getting what they call type 3 some of the time. That means the pancreas is damaged and stops making some or all insulin. That could explain the sudden change. Sometimes function comes back but sometimes not.
If your C-peptide hasn’t been tested since you might want to get it tested again. Just a thought just in case.