spinal fusion surgery

After one year of severe spasms with crippling nerve pain ,due to 3 impinged nerve roots . My surgeon agreed to a spinal L4 ,L5,S1 fusion
surgery .
After 4 weeks of recovery I feel elated to be able to sit for more than a few minutes , perform my daily constitutionals without crying out in pain , VICTORY !!!!!
However I still experience hot spasms within a few minutes sitting in a car .
Do any of you have residual nerve spasms !!