Should I be in this trouble with this?

So my BF was picking me up from my house and my mom told me to not let him in the house. When he came he told me he had to use the restroom and I told him I couldn't let him in but he kept telling me he can't hold it in so I thought my mom wouldn't mind having him use the restroom So when I got home from my date I told her that I let him use the restroom at first she didn't mind until she looked under the toilet seat and she saw it wasn't clean so she started to freak out and say "I told you not to let him in, aren't you embarrassed?" And she starts saying that I have no respect for her and she started throwing in my face that I lost my virginity at 18 what should I do and am I wrong?