My mom found out I’m not a virgin and made me awful about it

About a month ago, I had unprotected sex for the first time with a guy that I had been talking to for many months. I was not a virgin beforehand, but that was my first time engaging in unprotected sex. I am 18 years old and I live with my parents, but at the time I was terrified that I was going to get pregnant. He pulled out awhile beforehand but I know you can get pregnant from precum even though the chances are low. That being said, I have a journal that I write my prayers in and I wrote so so much in there about what I was feeling and how I couldn’t possibly have a child. I eventually got my period, but my mom read my journal and came after me. She called me easy, careless, and started screaming horrible things attacking my character and the guys when she doesn’t even know him as I have done my best to keep him out of conversation. I have never felt so horrible about myself and the fact that I had sex. I know having unprotected sex was a dumb decision, but the way that she slut shamed me makes me feel terrible about myself when I know I shouldn’t. I feel so betrayed as I am an adult and she shouldn’t have gone through my stuff to begin with. How do I go about moving forward in this relationship with my mom after feeling like I can’t trust her?