I just don't understand nursing bras or how to chose them and I'm looking for some advice.

Pre-pregnancy I was a 32DD. Now, at 35 weeks, I'm a 32DDD and that size has been stable for a few months now. I imagine my breasts will get bigger once I give birth and the milk comes in. I see all these nursing bras and they all don't have underwire. There is no way that my breasts will be supported by one of those flimsy things. I've tried them on and my boobs just look droopy. I can't imagine leaving the house like that.

Is there a reason all the nursing bras lack underwire? Where can I find some with underwire? What types do you ladies who are well endowed recommend? Also, I want to purchase nursing bras now so I'm prepared at the hospital and in the first weeks home. How to I chose a size if I don't know how big my boobs will get?

This is all so confusing. All advice and recommendations are much appreciated!