Help needed with 1st Bra

[Wills]

Should I buy something that fits now or has a little growing room

If the ones you have are not comfy, buy a new one which is. Don't buy lots of feeding bras in advance... I went up a cup size when my milk came in.

I found Blooming Marvellous amazing - so patient and helpful while I found some which fitted. Good range too. Our Mothercare was rude and told me I was an unusual size. At 34 E this may have been the case, but it's not what you say to someone full of hormones with a 2 week old!

It needs to fit properly. If it has growing room, it will be too big and it will be baggy and saggy.
Would you buy a bra for yourself that had growing room? I know it is tempting when it will be outgrown soon, but given the esteem issues to which teen DDs are prone, you have to do the decent thing and buy the right size.
PS, Primark have some really pretty bra and knicker sets for vv cheap reasonable prices. Their sizes are a bit mad, so they do need trying on, but pretty undies are nice to have, and these are so affordable that they are easily replaced when outgrown.
Hope this helps?