It’s too small

No, there is absolutely nothing wrong. You are just one of the gazillions of men who are obsessed about their penis size. Like I have said a thousand times before, don’t stress so much about size. If it really keeps you up at night, make an appointment with a psychologist. In the meantime, get hold of some books or DVD’s on how to spoil a woman to the point of fainting with pleasure - without even having to use your penis.