It sounds like an idea to explore in greater detail with your dr. Have you guys talked about it yet? How do you feel about it? What did he say?
I understand how this must come as a real let down for you. You worked your way to trusting your body, and yet things are not going the way you would like them too. It's really hard to say what going on, some breastfeeding relationships are harder to work out. The main thing here is that you are able to breastfeed your baby, to hold her close and nurture her. If you need to take medication to boost your milk production or supplement it does not mean that you have failed to be a wonderful mother to your daughter. You have really exhausted every avenue so far as I can tell from past reading!
Remember that the rule of thumb is feed the baby!