I'm currently 12+5 with my first baby (after a looooooong journey but that is another story). My boobs have gone up 2 cup sizes already and although they have never been super perky, they kind of held their own in a good quality bra. Now they feel so heavy though and I'm having to wear soft bras at night too as any time bra-less is really painful with my giant new knockers flopping around.
Last night was really hot and I went without and then I woke up this morning to see a bunch of horrible purple stretch marks on one of my breasts! 
I had always worried about getting stretch marks on my belly later on but on my boobs at 12 weeks seems really unfair!
So I guess I'm asking an "am I normal?" type question. Has this happened to anyone else? Did I cause it by leaving my poor boobs unsupported for one night?
Is there any going back or once the boobs start to drop is that pretty much it?