Babies cry, sorry. You'll hit various stages along the way, separation anxiety patches or whatever, but this too will pass... you just need to stick with it. You don't need to "fix" the problem so much as wait it out.
The Wonder Weeks is an interesting book/website - week 8 is the second "mental leap" of development so you can expect routines, bedtimes and things you thought you'd got the hang of to go out the window while that's going on:
"Research has shown that babies make 10 major, predictable, age-linked changes ? or leaps ? during their first 20 months of their lives. During this time, they will learn more than in any other time. With each leap comes a drastic change in your baby?s mental development, which affects not only his mood, but also his health, intelligence, sleeping patterns and the ?three C?s? (crying, clinging and crankiness).
Babies cry during a leap because they?ve reached a radical new step in their mental development. That is good: it gives them the opportunity to learn new things. The ?difficult? behavior is actually a signal that great progress is underway."
So the crying is a good sign, in a way!