Too small?

So lately I have been feeling a little worried about my vagina, specifically that it is VERY small. When I first got my period there was no way I could get a tampon in there and over 3 years later I can’t, I can get a finger in there easily but I can’t do two. I’ve been considering starting to have sex soon but I feel like I wouldn’t be able to get a penis in there. Has anyone else felt this way and overcome this? Or has anyone gone to a gynaecologist to ask about it?