Band 41 would be the most likely to cross react with Syphilis, S. Pallidum.
Here is a link discussing cross reactivity with Lyme. Band 23 is not one of them.
http://www.lymeneteurope.org/forum/viewtopic.php?f=5&t=1686Unless you have had symptoms from the first few stages of syphilis, it is not very likely that you have it. It is much more likely that you have Lyme, but you need to get diagnosed by an LLMD.
I think you're stressing yourself out for no reason-unless you have reasons you're not sharing with us-such as having symptoms or some reason to specifically think you have Syphilis. Cheating alone is not reason enough. If your ex had syphilis or he slept with someone who had syphilis, that would be a concern.
Try not to stress. Talk to your doc. Hopefully, you're seeing an LLMD. I would not be concerned about
Band 23 being related to syphilis. I hope this helps. This can be scary, but try not to stress.