Suffering from sciatica for 3 wks. all pain is now in calf. can barely walk. feels like pulled muscle. any suggestions? ins. co. said no to mri

Seen a neurologist?: Have you seen a neurologist yet? Although there may be a clinical suspicion of sciatica (vs the tendonitis that you already have), if your symptoms have worsened or progressed (as indicated by your question), then further diagnostics may be necessary. A neurologist should be able to justify the necessity for such diagnostics if clinically indicated. http://www.nlm.nih.gov/medlineplus/sciatica.html