Haven't read all the posts but here's my story:
DS1 was back to back through out late pg, labour and delivery. It took a long long time (imo) to get into established labour because of this. Contractions started at 2am on due date, finally went into hospital at 3pm-ish as was finding the ctx were getting hard to cope with (little did I know!).
They monitored me, and hooked me up to a TENS and left me be for a couple of hours. I spent most of the time kneeling up on the bed hanging over a bean bag, like you suffered from bad SPD and walking/standing for any lenght of time was beyond me at this point. Ended up going home early evening still with tens m/c on as still only 2cms.
Went back into hospital around midnight as things had ramped up. They kept me in, managed to get the hang of G&A which was good. About 2am I was getting frustrated and anxious so m/w suggested pethedine to help me relax as she felt I was starting to stall my labour as I was so tense (if that makes sense - it does to me). Progressed fine after that with G&A and TENS as required. Transition was about 7am when I just had to pull the TENS off my back it was winding me up by then. Ended up giving birth lying on my side with out any interventions other than ARM (that lovely crochet hook!) and 3 pushes later he was out. I had a 2nd degree tear but that's probably 'cause I pushed him out in a hurry and didn't really go slowly like the m/w was trying to encourage me to. He never turned.
In short - managed with TENS, G&A, a shot of pethedine, artificial membrane rupture and 2nd degree tear.
As an aside have to say with DC2&3, normal position, I couldn't believe how painful my contractions were in comparison to the back labour with DC1.
Good Luck.