I performed oral sex on a female sex worker for about 10 seconds. I thought this was very low risk. Then two days later I experienced some burning when I urinated. It only did it once but it scared me so I found some old antibiotics. I took 1 gm of cefuroxime axetil once and 100 mg of doxycycline twice a day for 6 days. At this point I had two small white dots on the skin of my penis, but no pain or bump. I then took 6 days of levaquin. I was tested for all stds at 25 days. All were negative. At 4 weeks I saw a urologist. He tested my urine and felt my prostate. He was not concerned about the white dots. After this I started having headaches and had a few bumps on my back. I was tested again for all stds at 52 days. All negative. At about 70 days I was tested again for syphilis because I was told that the levaquin could produce a false negative. That test was negative as well. I still have headaches and at least one or two small red bumps. How can I know for sure I am getting an accurate syphilis test after taking those antibiotics?