Talk to Dermatologist on Are These Syphilis Rash Or What?

I had exposures in past & saw gallery and noticed that I had this round flat rash in my arms and palms only on both hands in last year sunmer, these rash disappeared 1-2 days later without any treatment, so i ignored. Now i got to know about syphilis, Im afraid if these are caused by that but i took tests from Chugtai Lab Lahore & RPR/VPDRL, TPA & FT ABS, all were negative in serum, but i am still concerned about this year old rash that i had, what is your opinion? what does it look like rash and can syphilis rash only last 1-2 days? please answer this. Im student i cant afford appointments, i used my savings on my tests, so please try to accommodate me in replies. thank you so much. plus im also afraid of neurosyphilis, can you have neurosyphilis with negative FTA ABS or is it ruled out? jazakallah for your time, ill pray for your health. or should i for go other lab?