Is there such thing as being to tight you cant have sex?

Marissa

I'm a virgin but one of my worst fear of losing my virginity is if I'm to tight and the pain of course. I basically stopped growing and im like 5'0 and weight around 120. And I have done some exploring and I am sooooo tiny that I'm not sure if it's normal, I'm surprised that I can get a tampon in. But I'm scared that when I'm about to lose my virginity that he cant even get it in.....