Having trouble Masturbating (i think that my vagina is very tight)

I’m having trouble masturbating! I can’t even put two fingers in it I don’t understand what’s wrong with it everyone can put bananas and toothbrushes in their pussies but I can’t even get two or one finger in it, it’s too tight!!!! Does anyone have any suggestions on what I can do. I’m 14 btw I usually use my pillow and I grind on it