Idk how to feel

I’m 19 and my older sister decides to look through my stuff and she found “slippery when wet “ pills. She keeps saying how she won’t look through my stuff anymore & how I’m her little sister and i need to wait until marriage to have sex and i shouldn’t even be having sex and if she finds something else in my bag then I’m no longer to go outside again. I personally feel like she shouldn’t be looking through my stuff & im not saying I’m grown but i feel like it’s not her decision to tell me what to do. Also she contradicting herself because when she was my age she was having sex with boys and smoking weed.I’m just tired of the control. All her and my mother did was control me my whole life and i can’t wait until moving into my own apartment.