HELP ME PLEASE

charlie

so i am 15 and i have a boyfriend and we have been together for about 7 months and i lost my virginity to him and i am on the pill and completely protected from pregnancy and my mother knows i’m on the pill BUT my mother really really doesn’t want me to have sex with my boyfriend and she said she will put an end to me and his relationship and be very disappointed, but my step mother who is with my dad was talking to me about me and my boyfriend having sex and she brought it out on me and found out i am sexually active with him, she is a very evil person and used to abuse me when i was younger and she finds any way to make my life horrible and bearable, i have to see a psychologist from the trauma she has caused and i have cut myself very seriously in the past from her. bows she’s threatening to tell my dad and i cant let anyone know especially my father and mother. what do i do? she’s planning to tell my father this weekend when i am over and i am honestly so scared and i have anxiety. i don’t want to lose him and its been very very stressful. can someone please give me advice on how to handle it.