I had a back to back labour but as he is my first baby i dont know if it was more painfull but i had a lot of pain in my back and lower tummy and lying down was not very nice during labour i spent the whole time bouncy and rolling on a ball during labour which really healped and pushed leaning over the back of the bed but lo got stuck cos he was back to back and was getting distressed so i went to theatre and the used forceps to turn him and i pushed him out which was good cos they said if they couldnt turn him then id have to have a c. section they even ave me an epidural just in case or maybe it was cos they cut me im not sure!
I would say it wasnt the worse pain ever tho i kept waiting for the pain that made me shout and scream but it never came i breathed through my contractions and only had petherdine really early on then 2 co codimal and some gas and air but i dont think it did much really so i got annoyed with it and gave up! I think if he didnt get stuck i could of pushed him out without it!
Good luck and i definitely recommend sitting on a ball in labour xx