Medical records help

I’m 21 and I live in Florida. My mom nor my grandparents know that I have had premarital sex. I told my doctor the truth so I can look at some symptoms, but I don’t have my family on the list to see my medical records because I’m trying to take care of myself. My mom is one of those moms who wants to be involved in every aspect of my life and wants to know everything, even about my relationship with my boyfriend. My mom has now scheduled a doctor appointment for next Thursday and I’m nervous for things to go crashing down due to her wanting to go into the appointment with me against my wishes. If I list her to see my medical records, will it say if I’ve been sexually active? How do I get out of this? What do I do? Is there a way to tell the doctor that I wish for that information to be confidential? I hope someone can help, especially someone with a medical background!