That makes sense. I'd definitely try the gas again before going to peth or an epi. I didn't have gas as such, but I did use a Penthrox stick (I think that's the name?) in the ambulance trip, mainly for my anxiety. I found I had to get a good rhythm going with my breathing for it to work. Didn't do so much for the pain as it did relax me, I'm not sure if gas would be the same. Made things calmer and more mellow.