Nitrous during epidural shot?

Colleen • FTM living with hubs and lil Declan Patrick in sunny Florida...
So I'm really nervous about the big delivery day and I know I don't have a high pain tolerance. Epidural seems to be a good fit for me. However, I'm nervous about the insertion of the needle as well. My hospital offers nitrous for labor. It hit me a few moments ago that perhaps I'd be permitted to take the nitrous just while the epidural is being administered, just to calm my nerves and help me keep still. Does anyone know if this is or isn't permitted in hospitals where nitrous is available? Please let me know your experience. Thanks!