Demerol? Sorry this is long

Kristen
Five years ago I had my son, and my labor experience was less than ideal. I was induced, ended up in labor for 19 hours, 3 hours of which were on and off pushing. 
I had an epidural, which I found to be mind-blowingly painful. My mom has an issue with her spine that didn't allow her to have epis, and I'm wondering if I have the same problem since so many women find epis to be tolerable. It also didn't take on my left side at all. 
I'm only 10 weeks, but I'm already concerned about labor. I hear Demerol is an option, but I haven't heard much about it. I will, of course, talk to my doctor at my next visit in two weeks, but I was wondering if anyone had any experience here. Does it help? Any other things that got you through labor beyond the epidural?