Positive pregnancy test???!!!??

But here's my situation. I took a ept digtial test... Positive. And a clear blue digital test positive 1-2 weeks. BUT... I got my cycle 6 days late and I'm never late.  I almost fainted at work twice and tired all the time and that's not me.  How can I start my period if I'm pregnant or do you think it was a false positive and if so how? if I took two tests two different brands. Please  advice. I really hope I am..