I had sex with my boyfriend he used the pull out method..it has being two months 5 days since i had my last period. yesterday i took a first response pregnancy test for the 3rd time since i miss my period and it came out negative all the 3 times i have all the pregnancy symptoms and another thing is that i am taking lithium and focalin and i don't know if that could affect the results in the pregnancy test i don't know what to do