Vagina too small?

is it possible for your vagina to bee too small to fit any penis?
im asking because I cant get more than one finger up there and I've only tried a tampon once and it seemed to just barely fit.
will it expand with lube and an actual guy going in?

It can stretch, over time. Consider the people that get the bod-mod ear-inserts. The skin can stretch, over time.

Ideally, you would wait until you were married, so you only have to adapt to one size guy. Hopefully, he will have been instructed by older guys, so he knows to go slow, get you warmed up, so you are fully lubricated by arousal, and then be gentle.

The first time in, he will tear your hymen (binding himself in a covenant of marriage to you, for the rest of your lives.)

White guys normally have a lot of elasticity, and average about six inches in length. The elasticity is important, since in cold climates, they need to shrink so they don't freeze.

Black guys have generally less elasticity, so maintain full length, whether aroused or not.

With a shorter guy, you can use missionary position [you on your back,] where his pelvic bone bumps yours, so you can have clitoral orgasm, very easily, without his tip bumping your cervix [which could be painful for you, if it did.]

I think maybe your just a little nervous and tense. Just relax, that helps with it going in you. Also it may hurt but if you let it go all the way but then it will fit and it will be easier as you continue. Lube may help also. Thats being wet. If your wet then it makes it easier to slide in and out.