Hi K8, I had quite a long birth, the active stage of labour was 13 hours long as baby's head was stuck (and facing the wrong way!) so after a night of pushing (about 10hours or so) I decided to opt for an epidural through shere exhaustion - by that point I couldn't have pushed a door open without help, let alone push out a baby who didn't want to come out! By the time my baby was born I had two epidurals and five top ups but because of where my little one was stuck, it was actually not taking effect and so I had other drugs....well ALL the drugs that were available and eventually had her in theatre under local anaesthetic. Personally, I have not had a problem with the administering of the epidural or had any problems since, but I had to be kept in for 3/4 days after the birth because they had to fit a catheter twice and the result was that I couldn't pee for 3days! That was the only thing that would put me off having another.
As for your pains, they sound normal to me. I didn't feel BH as painful, more just tight, and I was induced in the end so don't know what "natural" contractions feel like when they begin so can't help there. Also, can't help with BP as, thankfully, mine was fine throughout.
Good luck sweetie xx