... fourth day of the placebo pills and I still haven't gotten my period. My breasts are tender, but I have no cramping or anything. I'm concerned cause last month period came February 12th-16th had sex on the 18th with a condom n started week 1 again on the 15th of Feb. Been stressing a lot lately thinking my period won't show up. Never missed a pill n been on trinessa combined pill for 1year n 2months. I'm really concerned. Can stressing n having sex delay my period?