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Regarding what you mentioned,

the average length of the fully erected penis is about 13 cm, so in this case the man will not have any problem during the sexual intercourse regarding the penile length.

What is micro penis ?

The micro penis is when the penile length in fully erected position less than 7 cm, so this will affect the sexual intercourse negatively.

Is there any cream or medication which may increase the penile length ?

There is no such medication.

What should you do ?

You have to visit your urologist doctor so that the doctor could do a full clinical evaluation of the case in order to confirm that everything is going well.
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