Suspected syphilis from kissing (both virgins and never kissed before)

So basically me 17f and this one guy 16m both kissed eachother, we both never kissed before and we are both virgins. I notice a very tiny dot on my lip after 17 days of the kiss and it disappeared but my lip still has something that looks strange but not very chancre like. So it's been a month since the kiss and I recently came back from a trip to my hometown, I am experiencing flu like symptoms and had a very mild fever earlier today and a few days ago but it went pretty fast, it started with tonsil aching tho but that went away after some remedies. I don't know if I got this sickness from vaping cuz I did vape with my cousins but now I see some pimple like things on my breast area and clavicle areas. I thought it was a syphilitic rash but it could also be cuz I didn't shower for a while because I have depressive episodes but I got scared and think I have syphilis even tho we are both virgins or never kissed, especially cuz syphilis is very uncommon in my country amongst teens and I heard it's not spread non sexually. I'm scared of I test positive for it my parents will think I've been fooling around and I just don't want that to happen because like I just kissed this guy once. What if he had congenital syphilis and never knew and accidentally gave it to me? I also wish I could have a good cover up story to tell my parents cuz in my country you can't get tested for these stuff if you're under 18 unless a parent comes with you and in my case I'm very scared.