As per your history
You are suffering from three different issues.
First for skin - continue advise by consultant.
Second fever - 10 days. - seek advise by physician and find the cause and treatment.
Third - back pain with right LL radicular pain. Once your fever subsided check how much is the back pain. As if it persists then need to evaluate by MRI.
Next Steps
Medicine for Fever,
Pain medicine
If pain persists after 2-3 weeks even and high pain score, then X ray and MRI.
Health Tips
Rest
Medicine
Physio
As you are lactating mother- take D3,
Calcium, Multi
Vitamin.