I'm sure this is an embarrassing question - and I'm sure if we have baby number 2 I'll laugh at myself for being so paranoid about the PFB... but... where I live a lot of the pavements are SO bumpy that DD (3 weeks old) gets rattled around in her pram so badly that I've started to worry I'm doing the same kind of damage as shaking a baby would do. I think I just need someone to tell me to stop worrying...