K.P.
Another resource is the lactation consultant at a hospital, I found a really helpful one at Lake Forest Hospital and I didn't even deliver there! I called about getting fitted for a nursing bra and ended up on the phone with someone and she was so helpful!
Anyway, as far as the constantly nursing thing, and the nursing more than 20 mins a side, it sounds like your baby is using your breasts to soothe rather than actually nurse, so you might want to try some other things... Babies love to suck, so that is why pacifiers help so many (my son wouldn't take one, so I too let him suck on my finger for a little bit and then helped) Some other things that you might try are hushing in their ear (louder than you think, too!) rocking, swaddling, all sorts of things that make them feel comfy and cozy and safe. White noise like the vacuum cleaner helped me too! There were definately days that I nursed on the hour too, so if the baby is hungry, they will eat, but if they are fussing on the breast it may be a comfort thing.
I heard the book the Happiest Baby on the Block has some good tips! One piece of advice I recieved when nursing that helped was the concept of the 4th trimester. Not long ago your baby was in your belly being constantly nourished and soothed. Now he or she is out in the open and has to adjust to every day life. I found the light comes out at the end of the tunnel at about 6 weeks (then again at 12) so hang in there!