NOT A TEACHER
I have a pencil. - present simple
I have had a pencil. - present perfect simple (though the example sentence seems quite strange to me - I cannot think of a situation I would use it, but that might be just my problem)
I have had this picture for 2 years.
I have this picture, because I like the yellowish background.
I have just had a shower.
I have a shower every morning.
Try to study the differences between the present simple and present perfect simple.
Student or Learner