Hi and welcome to HCM.
This sounds like typical lumbosichialgia with nerve
compression. You should do lumbal xrays or MRI
to see is there disc bulge or any other spine disorder
. ALso some neurologic disease may be considered but I am sure this is benign and you ll have to rest and take painkilers or corticosteroids
till symtpoms improves. Sometimes is surgery neccessary too. WIsh you good health.