Had l5s1 fusion with decompression on 3/29/19 severe leg cramps

Hello I have had chronic back pain for many years already had 2 laminectomy discectomys In 2014/2016 just had the fusion an the pain is unbearable with my left leg from back of quad to the whole foot already had numbness an pain prior to this surgery from 2016, how long will this last I’m walking a lot was only trying to take the tizandine but tonight has been the worst ever took 2 dilaudid an 2 tizandine at 12am was ok for about an hour started again took another relaxer an dilaudid still not calming down I can’t take the pain please someone tell me it’s going to go away or subside I know I’m only 5 days post op but I’m in tears from this pain please help