On 30 january,2019 I made biggest mistake and had sex with a sex worker, thereafter, from the very next day I had burning sensation at penis and increased urination. On 11th day I went to a doctor who suspected a fungal infection, also asked me to get tested with rpr(vdrl), HIV, urine culture & sensitivity and gave me some antifungal cream and fluconozole tabs plus martifur and doxicycline 100. The tests came back negative. He asked me to repeat tests after one month, meanwhile I was taking the antibiotics as advised by doctor. I got tested again with rpr(vdrl) , HIV and urine tests. All resulted as negative. But during that time I had some red spots on penis, a boil kinda rash on thigh and other rashes too. I googled things and found in some articles (though not particularly for syphilis) that too early antibiotics use may stop antibody production. And vdrl and tpha looks for antibodies. I have also done tpha thrice after that which came back negative.
Now, My question is - can too early antibiotic use (such as martifur and doxy100), stop antibody production for syphilis?
Plz help I am worried as I still do have some rashes but may be they are normal skin probs.