Hi M..
Sorry to hear about the death in your family. It sounds like you daughter has sensed that something is off and she needs your re-assurance. She will return to her old schedule just keep up your regular bed time routine. I personally wouldn't allow a child to scream, if she can't tell you what's wrong, this is the only way she can communicate.
I just read an interesting study on Dr. Sears' website that suggests independent sleep training actually has the opposite effect later in life, as adults it is more difficult to get to sleep and stay asleep all night. It goes on to say that children who sleep near their parents have less sleep issues as well as less discipline problems and are more able to problem solve and play independently. Another recommendation I have is the book, The No-Cry Sleep Solution by Elizabeth Pantley.
In today's day and age it is very inconvenient to have to ease a child to sleep and deal with them during the night when we need a good night's sleep ourselves. Good luck with finding a solution. I'm sure its been difficult with the death in the family and also stress at bedtime.
Condolences,
R.