Sexuality confusion!

Am I gay? Am I straight? Am I bi? I'm only a teenager, and I think I might be bi. Friends have asked if I am, as they suspect so, even my mother has her suspicions. I don't think I could 'come out' whilst I'm still in school, I couldn't face it. I have people shouting 'lesbian' at me in school already! I feel attracted to both females and males, however I don't want to say I am bi to a single soul incase it is 'just a stage' as some people call it, and it is extremely hard to loose labels. I can't stop thinking about this😩😩