It is a part of protocol to investigate for some other Sexually transmitted diseases (STDs), once a patient is observed with any STD.
genitalis is an STD, the other investigations were done.
Since your doctor has informed you about the results, there is no point to worry about.
Just cheer up and be cautious in future.
Faithfulness with the partner, and using safety measures is the key to avoid STDs.
Dr. Ajit Singh Kulhari
MD -Skin & VD