Need help/prayers

I'm a teenage girl in Christ.. But I lost my virginity instead of waiting till marriage. I always wanted to wait, but I'm not sure what happened and I feel nothing but guilt ever since I have. I want to tell my mom since I hate that I have to hide this from her, but she's a strong women in Christ ,and always has told me not to let anyone touch me unless it's my future husband. I'm afraid of her reaction cause I really feel like I've let her down because she always has trusted me, and of course God... I feel like a unworthy sinner after what I've done.