hello..i've been using trust pills for 3 years. Suddenly,I was worried because my period was delayed. Supposedly, it was regular that when I'm on my number 26 pills the brown color my period will come out. But, untill i finished the last pills the number 28 on july 9, 2014my period did not came out. So, i stop taking a new pack of pills.I was doing pregnancy test but it was negative..July 15, i started a new pack of pills and taked the 4 tablets ( numbers 1, 2, 3, & 4) one at a time and had our sex intercourse that night. And July 18, 2014 take the other 4 tablets of pills (5, 6, 7, & 8) one at a time again.As of now my period haven't came out and i'm on the number 11 pills now but still it does not came out. What should I do? Should i stop taking the pills?