Thanks for the query.
As your test results came back as negative and as you are not having any symptoms, there is less possibility for any infection.
So no need to worry.
If you have any symptoms like altered or increased vaginal discharge
, itching, external lesions etc, then there is possibility of some infection.
In that case consult gynecologist once, get examined and go for vaginal swab culture and sensitivity.
If you do not have any symptoms in these 12 weeks, there is less possibility for transmission of any infection.
You can repeat the tests after 3 months as told by your doctor to rule out the infections.
Better to use barrier method of contraception