I'm thinking she is having her 6mo growth spurt... with my ds#1, we had this horror time when he wouldn't settle at about 5 1/2months, I bf & then one night, no idea why I tried it I gave a bottle too & he settled... Have you tried giving her a second bottle when she won't settle??
Re the routine, there is no "one size fits all" & if you want some ideas you could try looking in the EASY forum, where most Routines are posted & then see if you can get ideas to fit around your preschoolers needs & also your lo... I know that my ds#2's routine is pretty fluid to fit around toddler activities. but I do try to make sure I don't over tire him, which is a main issue with sleep problems.