I at just under 5 months now myself, and the last couple of weeks or so, I have really noticed the change in physical shape and the barest hint of cleavage myself. I think I have gained about 1.5 -2 inches across my nipples. AT times it is barely noticable, but I'm noticing it a lot more now. They really stand out to me visually while I'm getting dressed right after I shower. I see that my undershirt hangs a bit differently then and my nipples are definitely noticable then. For better or worse though, they quickly blend back in shortly there after for the rest of the day.
I can't feel my breast buds anymore more, or at least not as definitively as I could 6 weeks ago. But my nipples are constantly sore to the touch now, but only when I touch them. So far my shirts are not bothering them yet. Though I'm not sure I would mind that right now, as it would be a further constant reminder of my changes. Aelcomed reminder. I'm also noticing too that my nipples really ache when it is cooler. It was rather cold at the office today, and I could feel a good ache/shiver/shill in them all morning and afternoon.