Your problem is ignorance.
If only you know how sexually transmitted diseases are
passed.
Please make sure to get a blood test every 6 months for
STDs.
Many sexually active people arn't even aware they are carrying
STDs.
Viruses are transmitted via body fluids. Condoms are not 100%
effective against STDs.
Nowadays medical kits is so advanced that there are
test-at-home products are available on market to test
whether you have STD : http://www.mylabbox.com