Herniated discs in back?

Does anyone have herniated discs in their back at L/4 & L/5? I had one epidural cortisone injection on Dec 20th & have been in terrible pain ever since. I'm scheduled to have another injection on Tues & am scared to have it done. I have also to started to take Lyrica which seems to be helping a bit.

I couldn't finish the EMG test because the pain of the electrical shocks were so bad. Does anyone have any opinion/ advice on what I should do?