I've only been using the contraceptive pill for a month and a half now, and have noticed my breasts have grown a wee bit. Probably not noticably, but naturally I've noticed it. Not a hindrance by any means!
The pill basically works by fooling your body into thinking it is already pregnant, so that you cant get pregnant again.
And guess what!! When you are pregnant, your boobs grow, so, yep, the pill does cause your boobs to get bigger!
Not a hindrance for you maybe, but i was fairly amply provided for to start with, so really, i could do without the extra!!
It basically just messes with the hormones to fool your body. There are more complex ways to explain it, but that is basically what my (very good) doctor told me when i moaned about putting on weight and getting big(ger) boobs! You eat more because your body things you are PG and tell you to eat more to compensate- which is wh you need to watch out for that, as not actually being PG, you dont need to eat more, unless you want to gain weight!
The symptoms will vary by pill, but these are generally fairly common across them all.