Thanks for your query.Based on the facts that you have posted it appears that you were born with some congenital abnormality of Penis mostly Hypospadias
. You have undergone three surgeries in childhood and you are not sure about the nature of the surgeries done.
If you are getting hard erection there should be no problem in doing sexual activity.However this can be confirmed only on clinical examination so please consult qualified Urologist
for clinical assessment and advice,
There is no medicine that can increase the length or size of the penis,