Go to the doctor, get referral for MRI.
Go for an MRI, take a picture.
Go to the doctor, you know that you have a back - injury, inflammation, pinched nerve, protrusion, hernia.
Listen to the advice of a doctor what to do. Decide how to live.
Just without diagnosis by MRI to go to the gym, especially if you have a herniation/protrusion is killing my back completely. Go for a massage with pinched nerve or inflammation little sense. There's no need to wait, maybe even beat it, if the inflammation has gone away and itself does not want to go.
In General, the first thing is the diagnosis. Without it - it is better not to start.