Penile Mondor's Disease. That i had sex?

Hi, I had the symptoms on the 5th of March. On the 12th of March, I saw a urologist who diagnosed me with allergic reaction to the condom, he prescribed a Cortisone Cream for 7 days. 10 days later I saw him again with the symptoms better but not gone. he spoke about another problem that didn't make since to me. On march 28, I went to another urologist, who performed ultra sound exam and told me that I have Penile Mondor's Disease. He prescribed cream, bills and Voltarin for the swelling for 14 days, and if the problem didn't go away, he would perform surgical procedure. He didn't tell me anything about sex, and I had sex twice after seeing him, and a total of 4 times since noticing the problem, then i learned that I shouldn't have. My question: I trust the 2nd urologist, but how can I avoid surgical procedure? and how bad is it that I had sex ? Thank you.