I've recently started taking Tri-Cyclen Lo for the second time. I took a three to four month break from it while I was single.. I took the entire 3 weeks of active pills (was late taking one) and had unprotected sex during this time, so, for backup.. I took Plan B. While taking the sugar pills I didn't get my period but Once I started my active pills, I got my period.. Is this normal? I feel like my periods will be all messed up from now on and am I protected from pregnancy?