BV and yeast do no increase the risk of transmission, that I am aware of, no.
If he has not had symptoms within 2 weeks, obvious infection is unlikely. Do you actually know his antibody status?
BV is not a sexually transmitted infection but yeast can be resulting in redness of the penis, sometimes in stripes. But I don’t think you are under any obligation to disclose these two infections, no.
yes, best to stay off antivirals until antibody testing is complete. it can throw off the results and no, neither of those infection impact herpes antibody testing
You should wait 12 weeks for a final antibody test for greatest accuracy, and you should be off antivirals for that long before testing.