Revealing mistakes: In the original scene of the accident she is shown to continuously stare at the car's mirror without tilting her head. In the last scene (where she remembers who she really is) it is visible that she tilts her head to see the blood on the right temple. Besides the fact that it's a mistake, it's misleading.
Factual errors: In the beginning of the movie, when she is examining X-rays, she shows her assistant a case of Situs Inversus. This refers to people who are born with one or more organs reversed in position. She states that the condition is very rare, occurring only once in every 1000 births. In truth, Situs Inversus occurs once in every 10,000 births.
Continuity: As Gina walks past the wrecked cars in the wrecking yard, she passes the same car (J667 YWY) twice, only a few seconds apart, without changing direction.
Errors made by characters (possibly deliberate errors by the filmmakers): When talking about the case of Situs Inversus, she says "It's not uncommon... but it is rare."