Not sure what you are asking....are you questioning what was in the shot or why you have the pinched nerves???
If you are asking about the shot, it was probably a steroid shot. The reason I say this is I also get steroid shots in my back and left shoulder (depending on the day) and I can only get them every two weeks or so.
As for the pinched nerves....sounds like someone did a boo-boo.
Enjoy when you can, and endure when you must. -- Goethe
Diagnoses: FM, Sciatica, Rosacea, Piriformis Syndrome, SI joint disfunction, Joint Facet Syndrome L3-L5, Pinched Nerve (somewhere on the left side), Depression, Anxiety and Bipolar II