I had something similar going on, and was trying the Lansinoh/breast milk/nipple shield regimen to no avail. It was strange, because of all the lactation consultants and nurses I was seeing over the past few weeks, no one really seemed to think it was strange that my nipples were essentially two open wounds! Super painful, but I had heard it would be, and thought it must be normal.
finally I met with another nurse/lactation consultant who recognized that there was a problem. she prescribed triple nipple cream - it's a compound of anti-bacterial, anti-fungal and anti-inflammatory. had to take LO off the breast for several days and express milk, supplement him, while they heal. but they are almost healed. that stuff really works.
don't know how bad yours are, but it might be worth it to get checked out. good luck!