concerta and my privacy

concerta and my privacy i use concerta and it helps my stutter a lot, my parents are divorced and i stay with my mom so my mom sees a guy i told her i dont wanna meet until its serious but i saw a text my mum sends like my son use concerta and has a speech disorder kinda text i know i shouldnt look through her phone, so i asked if she told anyone i see a psychiatrist she immediately get defensive and told none of my business how is that none of my business am tweaking or should my mom breached my privacy for a guy she met