Gaslighting is probably the most "crazy-making" of the forms of emotional abuse. It is a denial of your experiences and your perception of reality. When someone tells you enough times that something you remember didn't happen or that they didn't say a thing you're sure they did, or that you said a thing you're sure you didn't, you begin to believe that your memory is unreliable. And then you begin to depend on that very person to tell you what happened. That is a dangerous place to be in. After experiencing gaslighting, you need to re-learn to trust yourself. The first step is recognizing that this is happening to you.
With gaslighting, information is twisted to favor the abuser. Often, but not always, it is done in a premeditated manner. We have all seen small children twist a story after the fact to get out of discipline, but gaslighting is not the same thing. It is not done to get the abuser out of trouble, but to gain further control over the victim. They may accuse you of being the instigator in a situation when they poked you to get a reaction.
The purpose of gaslighting is to make you start acting like you are out of control. Another sign that you are the victim of gaslighting is if every time you try to talk about your experiences, the other person makes the conversation about them, as though they are the victim of your behaviors, despite you being the one who brought up a grievance. A truly caring partner, friend, or family member will listen to you with compassion and want to help if you feel there is a problem in the relationship.
You should also keep in mind that is stressed, angry, or upset, will cause you to have trouble with your memory of the situation, and this is normal. It does not mean you are crazy if you cannot remember the exact words you or the other person said during an argument. So don't let someone use the results of stress against you.