Disk herniation is of 4 types, without your MRI films it will be difficult to answer. Short course of medrol won't affect your
sugar levels that bad. You can start having resner plus twice a day. You don't have improvement, because you have disk herniation and that is affected you badly. I'm Dr Balaji, I have experience of 11 years. You can take a consultation so that you will be able to understand more.
Next Steps
If pain is bad, I do advise for surgical intervention.
Health Tips
Bed rest, IFT would give some edge.