Hugs hun, I've been there but I can't imagine having a 3yo to look after aswell... hugs hugs hugs...
It sounds like it could be one of two things: a prop problem or ut??? Does she have anykind of prop you can think of? How long have you been at this A time?
Something to remember is that she may be going through that 4mo gs... it was a killer for us and naps, nights and A times went completely wonky at this age... to be honest we just had to constantly upgrade his routine weekly after he turned 4mo and it could be what you are dealing with right now?? What do you think?