If you had underwear on the whole time, there is no risk.
If she said it was an allergy to hair removal cream, it probably was. Syphilis doesn't cause black spots on the body. The rash is very specific, and it's not black.
I can't see any real risk here. You used a condom for the oral sex, and there is no risk from the kissing.
If these massages scare you so much, maybe it's a good idea that you stop getting them.