Like I say it’s very hard to say when we can’t see your pictures (not sure why that is, too technical for me) but with unders they definately take more time to settle. 17 days is nothing at all so there will be so many changes to come. I remember thinking mine would never equal out. They were a completely different shape and size. I stopped looking at my boobs all the time (which was hard) and I kept a photo diary taking 1 photo every week. This is when I really started to notice the changes. I would recommend that you do this.
I would say the feeling of having bruised ribs is also normal but if you are worried I would give your nurse a call x