Welcome to HCM,
As saliva contains HIV in very minute quantity, therefore chances of HIV transmission through saliva are very low.
If bar girl is suffering with ulcers in her mouth, chances of transmission will increase.
During window period HIV test
can give false negative results.
Thus you should get your HIV tested after 3 and 6 months of the incidence.
If bar girl is known HIV +ve , you can take post exposure treatment for HIV, to further reduce the chances of transmission.
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Hope you found my response to your query informative and helpful.
If you have further concerns in this regard, you can submit those with Healthcaremagic as well.
With good wishes,
Dr.Chandra Shekhar Sharma