Best time

Lisa • My SO and I are expecting our first baby girl February 1, 2017...this is our rainbow baby!!! I am 19 years old and I am looking for mommies around my age to talk to and or become close friends with!
When should I start to buy nursing bras? I am currently 20weeks and 4days and the bras I currently have do not fit right. Should I just to to walmart and buy a cheap one that fits until I am farther along?