I got checked 4 years ago for what I though was all STDs but they never did blood test and I think thats the way to test for Syphilis ? All clear for Chlamydia, Gonorea and Trich. But I am concerned maybe Syphilis. I read you can not know you have it till much later. Reason I ask is that I have had penile pain in left side of shaft for4 years. 3 years ago I asked doctor and he said sometimes that just happens and nothing can be done. He asked if I wanted Syphilis test but I mistakenly thought it was already done and said 'no already checked'. I have had no other visible symptoms, just constant pain in left side of willy. Would like to hear others experience with Syphilis.. and what to look for maybe?