Nursing bra

My friend suggested I get a nursing bra, since my boobs have been hurting. Apparently being large chested that's not a good option! I was a 42 DDD before getting pregnant. Just measured today and I am now a 42G. Looked at 2 stores locally 1 specific to maternity and yeah, biggest was a 42C. Anyone have any suggestions on places I can try? I bought one online from Motherhood Maternity and bought the 2x according to their size guide. Not even close! Kinda bummed right now!