Concerned

Shelbs
I'm 5 days late on my period and I've taken 2 different pregnancy tests. They both came out negative. But I still haven't gotten my period or have any symptoms. I'm worried that the test are false. I have had sex before. I'm not on birth control. We did not use a condom. I'm in a loving relationship. We use the pull out method, I do know that isn't a very effective method.