Hi,
Welcome to HCM.
Length of penis should not worry you. Small testis needs to be examined and assessed whether they are really small or within normal limits. You need to consult an
urologist, who will examine you and if necessary, get an
ultrasound study of
scrotum done.
I think most probably every thing is alright, it just
anxiety on your part, but it is always better to get a professional opinion.