sti help

so i just found out i have an STI and i’m in college. i’m still on my parents insurance plan and i’m afraid that they’re going to see the test and antibiotics from my university health services center. technically i’m 18 so this is private info but i’ve heard that it will show up on the insurance bill. i really don’t want to tell my mom because i had another incident this past summer with an STI and she’ll know that I had sex without a condom. i don’t need a lecture on safe sex, this guy insisted he was clean, im really just looking for some personal advice here. thank u :)