My Husband Has Low Back Pain With Sciatica, Hypersensitive Skin

My husband has low back pain with sciatica, hypersensitive skin right thigh to knee and periodic feeling of warm water running down his thigh. Had MRI last night no results yet. The pain is severe and his basically been prone all day. Is it safe to wait until Monday to hear the results from our MD. He has a history of Pancreatic CA type 2 B. Recent scan showed possible liver lesion small