I did natal hypnotherapy and got through my induction on gas and air - not because I was brave (I was screaming like a banshee for a lot of it) but because labour progressed so quickly that by the time I was begging the midwives for pethidine, I was fully dilated and it was too late. I was pretty gutted!
I had one dose of gel. Contractions started within 2hrs; established labour 5hrs after that; fully dilated 3hrs after that. DS born 3hrs later. Hypno helped a lot with the early contractions (as did the TENS machine) but by the time I was in established labour nothing really helped. I spent much of it in the bath off my head on G&A. Shame you can't have that - it was BRILLIANT and not sure I could have done it without it.
The hypno also really helped me relax in the last few weeks of pregnancy and to stop me feeling frightened of the birth. Though I yelled a lot when having contractions, DH told me I was perfectly calm between them, just staring silently at the ceiling. I just felt I had to conserve my energy. There was meconium in my waters so I had to be monitored, which didn't help, as I ended up flat on my back.
It was very intense and if I were you I'd keep an open mind about pain relief, especially as G&A not an option.
I also refused to be induced on the date they wanted to and insisted on delaying it for a couple of days (until I was 41+ 5). They didn't like it much and I still didn't go into labour spontaneously but I think it meant my body was more ready and that's why the gel worked so quickly. I was dreading a long drawn-out process with drips etc but it was v quick in the end.
Good luck and keep breathing!