Thanks for your query.Based on the facts that you have posted it appears that you have grade 3-4 varicocele
. Though it is difficult to predict whether you would have problem of infertility
in future normally there are 50% chances of infertilty in a person with Varicocele.
Considering the high degree of varicocele It will be better if undergo a surgery of varicocelectomy or else get your semen analysis
done to see sperm count
and motility of sperms.and monitor it every 3 months by repeating it to see status of sperm count and morphology of sperms.