Continuity mistake: The beginning of the movie was set on Thursday, the day after Jim died, and Bridgette's face was just fine. Later in the movie, on Saturday, Bridgette was at the funeral with cuts and stitches on her face. Then, the movie goes back to Tuesday, the day before Jim died, and they show Bridgette running into the glass door and cutting her face. So if it happened on Tuesday, the first scene of the movie (Thursday) should have shown the cuts on her face.
Continuity mistake: When Linda is writing out the calendar of the order of the events each day, she writes Mon, Tues, Wed. across the top very hurriedly. The second time we see the days, when she writes "Jim alive again", the three days are written differently. The "M" in "Mon" crosses the line below the first time but not the second. The "T" in "Tues" crosses over into the "Mon" column, almost underlining the "Mon". It is much tighter the second time we see it. The "Wed" touches the right side of the column in the first but the left side in the second. Later when she pulls out the calendar again and adds the name Claire, the days of the week are written a third way. Originally the word "Cuts" didn't have an exclamation point but later it does. The word Funeral is first written at the top of the column near the word "Sat" but later it is seen much lower down the column. The phrase "Find out Jim died" is first written very small but in a latter shot it is bigger with the "F" extending into the previous column which it didn't do earlier. It is written a third way when she pulls out the calendar again to add Claire. Apparently the calendar was written at least three times.
Continuity mistake: When the psychiatrist is going to sedate her, he moves from her right to her left and back a few times in the same scene.
Continuity mistake: in the scene where Sandra's character is looking for the Dr. phone and the page is ripped out of the phone book, she sees it in the trash. When she goes to the trash the phone laying on the table is pointing toward the trash can but when she goes to pick it up it's turned another way.
Continuity mistake: in the scene where she goes in the bathroom and she finds the pills in the sink for the first time, she picks up the medicine bottle but when she sets it back down on the sink the bottle is a different size, it is smaller around than the one she picked up out of the sink.
Continuity mistake: Monday (Tuesday?) when Linda is driving down the road, distracted, her passenger side visor is down. When she gets pulled over, she needs to pull the visor down to retrieve her registration.