Based on the information provided, it's challenging to categorize the specific situation as "bullying." Bullying typically involves repetitive, intentional, and harmful behavior that aims to intimidate, hurt, or dominate another person.
However, your feelings of invasion of privacy or discomfort with your mom going through your personal belongings are understandable. It's essential to have boundaries and respect for personal space, even within a family setting.
To address the situation, consider having an open and honest conversation with your mom about how her actions made you feel. Express your concerns and let her know that you value your privacy and would appreciate her understanding and respecting your personal space.
It's also essential to communicate with empathy, as sometimes family members may not realize the impact of their actions on others. By discussing your feelings calmly and respectfully, you can work towards finding a resolution and establishing clearer boundaries regarding your personal space and belongings.