I am sorry you are dealing with this severe pain. Symptoms radiating from your spine down to your toe often indicate nerve compression (like sciatica). Since walking and sitting are difficult, please see a doctor promptly for a proper diagnosis, which may require imaging. For temporary relief, over-the-counter pain relievers like ibuprofen or acetaminophen can help manage inflammation and pain. A physician can prescribe stronger medications, such as muscle relaxants (like cyclobenzaprine) or nerve pain medications (like gabapentin), if appropriate. Avoid starting prescription-strength drugs without a medical evaluation to ensure they are safe and effective for your specific condition.