Welcome to our Forum.  I'll be pleased to comment on your questions.  Before I do, let me complement you for your safe sex practices.  Most of the sorts of activities you describe (manual stimulation/masturbation, frottage, deep kissing and protected oral sex are entirely safe sex with no risk for acquisition of STIs, including HIV.  with unprotected oral sex there is a small risk for gonorrhea or non-chlamydial NGU but the risk of these infections is quite small, even with partners who are CSWs (remember, giving a client an STI is bad for business.  As a result, most CSWs take appropriate precautions and get checked regularly for STIs).  If more than two weeks have passed since you last received unprotected oral sex and you have not experienced symptoms you can be confident you did not acquire an STI because almost all gonorrhea and NGU is symptomatic.

As for your specific questions:

1.  My comment was in regard to HIV but the statement is appropriate for all STIs.

2.  Almost no risk for syphilis from kissing anyone, including TS or CSW.  They would have to have a lesion that was directly contacted.  Oral lesions are very, very rare.  EWH

Our Forum calls for up to three replies per client and your questions have surpassed that. Therefore this will be my final post as part of this thread.  Obviously I cannot examine you to comment.  What you describe does not sound like a syphilis lesion as these are usually larger and solitary.  Despite the atypical appearance this is more likely to be an HSV-1 outbreak than anything else.  In our clinic, in addition to a clinical examination, at this time we would do a syphilis blood test (once a lesion is present, the blood test is typically positive) and a PCR or culture for herpes virus.  I know the clinical resources for such testing are available in Israel and that is what I would try to do.  

I hope my comments and suggestions have been helpful to you.  As I noted above, this reply will complete this thread and it will be closed in a few hours. EWH  .