Lump inside vagina?

So I’m 16 and a few times when my bf is fingering me he’ll be like “what is that”? and he says he feels a lump. I’ve fingered myself before and I’ve felt it to, I’m thinking it’s just the way the inside of my vagina is. Sometimes I feel it sometimes I don’t depending on how I’m laying or siting. My bf thinks it might be my “cherry” cause I’m a virgin but can u actually feel a cherry?? I’m getting a little paranoid abt it lmao. Thoughts?