Is your cup size going up because your back size is going down with losing weight? Or are they still actually growing? I went up 2 cup sizes in the first few months after DD was born as my back size dropped.
Though actually DD is now 7 mo and my boobs seem to be starting to get slightly smaller. I was a C pre-pregnancy and am still an F.
I had a couple of thoughts, actually. The big difference has been quite recent as ds has started taking more solids so perhaps it's due to him feeding less or even me ovulating perhaps? He still feeds quite a lot though...
Anyhoo, the moral of the story is I must get some new feeding bras!
I don't know about bigger but I've noticed that my left one looks bigger than my right boob - is this v bad? Will it even out? I start each feed on alternate boobs so they should get equal treatment! I do think DD prefers the left one though, not sure why!