Juhehehehehehe's Things

i'm a bi 16 year old and i have been in the closet for 5 or 4 years.i really want to come out to my parents and peers at school because its quite frustrating inside the closet. My parents are really homophobic and i was also raised learning that liking the same gender was a sin. when i found out i wasn't straight i was in denial but i gradually accepted myself thanks to fellow lgbt+ online. recently, i think my parents has suspicions because they started insulting homosexuality and bisexuality in front of me and started lecturing me about how i'm going to hell. should i just officially come out since they have their suspicions or should i stay inside the closet till i graduate?