My iPhone has not been letting me delete my history, what should I do

Even though I'm 14 years old my mom set up a screen time account thingie on my phone-kind if like a experiment-. Recently I stumbled on some ADULT content and I'm talking XXX rated stuff. I did not mean to but it kept comin back! Now that i'm OK i went to delete my history on safari so that no one would see but the words were grey and nothing happened when I clicked on them. Please Help! My mom goes on my phone A LOT and so do my friends, I would be so ashamed if they saw! All the remedies online included putting the password into the screen time account and fiddling with that history but I don't know the password and can't ask my mom!

I would take your phone to a phone place and ask thern to delete it