birth control HELP !

Okay so I started taking birth control for a month and then I missed a week before I was able to get the next set of pills. I have been taking the pills irregularly and I let my boyfriend know what was going on so we could stay protected and all. But my period is now about 6 days late and I have no signs of starting anytime soon(I usually start showing signs about 3-5 days before hand) My friend said I should take a pregnancy test just in case. Could it be possible the birth control is messing with my cycle because I've been taking it irregularly ? Help !!