M.J.
Hi-
All babies and kids have their bad weeks of not eating or sleeping well, sometimes we do not know why. As long as she is active, and does not appear sick, then don't stress too much. Babies can't talk, so we look at "how are they behaving?" Teething can sometimes cause them to be restless and irrate. If she doesn't want to eat, then don't force her. A baby will never go hungry or starve to death. If she is sleepy, she will sleep eventually.
Don't stress...look at the big picture and as long as she is happy, then this soon shall pass too.