I am two weeks removed from L5/S1 fusion (screws, rods, bone to replace the disc). The hardware is fine, no infection, but I have had unbelievably severe leg pain especially at night. It feels like every muscle to include my calves, hamstrings, quads, groin, etc... are so tight that I can't move. During the day I can walk around and with meds I can get the pain down to a 5, but at night I reach 10+ pain levels. Is this normal? Is it a part of the healing process? How long does this last?