Should I Be Concerned About A Bend At The Head Of The Penis When Erect?

My penis if gets full erection bends at the head … if i have a strong erection my penis size is ok but without erection .. i feel my penis is small and not of normal average… is this a area of concern , what is the average penis size if it is not in erection … is this normal to have small penis without erection…. And what is the difference between circumsion and phimosis … how much does this operation cost …