You have come to the right place! I had thrush for NINE months with my daughter...and we tried EVERYTHING over and over, spending over $300 on medications, with no result. And the pain!
This is the key, and it will work: 1 part white vinegar, to 6 parts water. Make up a bottle of it (in an old water bottle, or something--though you need to be sure to label it). Then, keep cotton balls around, or Q-tips, and dip them into the solution and slather them on everything, nipples, your baby's mouth, your baby's hands, anything that comes in contact with the milk. Wash your nursing blouses and bras separately, with some vinegar thrown in. Every time you nurse, wash your nipples in it before AND after nursing. Your baby shouldn't care about the taste, and it won't hurt her at all, even if you take a Q-tip with it and wash off her gums (in case she has white spots on her tongue).
I know it sounds extraordinary, but it works! You will feel relief the first time you use it, and the pain should be completely gone in a few days. Do NOT discontinue using it, though. Keep it up for at least 2-3 weeks, and any time you feel a twinge again, start it up.
I wish you luck. Believe me, if you do this, you will feel better very quickly. And it's the ONLY thing that works (but it's also very inexpensive). You should also tell your pharmacist, and your doctor, because the treatments they have now for thrush simply don't work.
Call me if you need more reassurance it will work, or even if you want to whine (the pain is terrible, I know--I still remember it!). My number is ###-###-####.
Good luck!
C.