Honesty I have Used The Same Bras I Wear Any Other Time. I Just Slip The Strap Off Or Pull It Over My Boob. I Never Leaked Tho So No Need For Nursing Pass.
I always wore a sports bra at night and during the day a nursing bra. You need the support, plus you will leak so you'll need to be able to put a nursing pad there. There are tons of bras to choose from but I was always told, a cotton nursing bra with no under wire. Not too tight, no too loose. If you really want to be fitted right, maternity stores can usually size you to the right bra.
Oops nursing shirt not bursting.... though I suppose some bursting may happen with nursing too!! Lol!
Keep an eye out on zulily too, they have nursing tanks (great for making any shirt a bursting shirt) and bras fairly often on there, I've seen them as cheap as 9.99.
Anything to tight will affect your supply, that's what the hospital told me when I had my baby girl. I went to target and got a nice nursing bra for $16.99.
A front closure bra will be easier for youbtgen a sports bra. But Target and walmart sell nursing bras now. You should at least get a sleep bra for nighttime.
Sports bra...walmart has them 3 for $9.99 and those joe boxer two packs cotton with underwire same price. Not to tight or to loose. Im a d cup so i need support and comfort especially when milk comes in.