Thanks for your query.Based on the facts that you have posted it appears that you have Varicocele
and Chronic Epididymitis
for which you have been taking antibiotics and undergone surgery twice. with unsatisfactory results.
Your left testicle may be swollen due to what is called as secondary Hydrocele
which can be confirmed only on clinical examination Please consult qualified Urologist
or Surgeon for evaluation and further treatment.