First of all don't be panic
What you need right now is ASAP APPOINTMENT with a spine specialist/neurosurgeon
Till then take painkillers
Tab Ketridol DT sos it helps with such pain
Or tab etricoxib 90mg sos (if u don't have any renal problems)
Next Steps
book appointment to spine specialist or neurosurgeon he/she might advise ur for MRI spine to see what's wrong going on
don't lift anything heavy take rest
try to book appointment ASAP Or u can directly go into emergency of ur near by hospital where they have on-call neurosurgeon