Paula,
Hang in there! Day 4 is the absolute worst for many of us.  For some it's day 3, others day 5 but I have found Day 4 to be awful awful awful as a common theme.
The first week is really bad.  It gets better in the second week.  Hang on, you can do this.  Do watch all the videos you can, they really help!
A big hug from Arizona,
Alicia