Hi
Welcome to procto
As you told you git
HIV test 3 year past and your test negative.
There is a period we called it window period of HIV it may up to 3 year depend upon persoon and immunity and during these period test become negative after that it become positive if you are infected previously
So please investigate itself by HIV, HCV and HbsAg test and see the results.
Thanks
Next Steps
consult privately for better response