Thanks for your query.Based on the facts that you have posted it appears that you have have mild Varicocele
.However this can be confirmed only on clinical examination So please consult some surgeon .Get your color Doppler study for scrotum
done to confirm the diagnosis.As regards your second query normally the left testis is little lower than the right and it does not have any significance. Surgical treatment
is needed only in grade 4 varicocele which is decided on clinical examination and results of Doppler study. Mild cases can be left alone and monitored.