confused¿?

katey
i was on the combination birth control pill Junel f/e for about 4 months but around a month ago i decided to stop taking it due to a bunch of side effects that made me overall unhappy and crazy all the time. I am now a day or two late on my period... i feel very hot and my head hurts, i've noticed some acne and other signs of pmsing for me... i had sex twice but both with condoms which didn't break and my bf wasn't near (yanno) in me... is it normal to be late on your period after stopping birth control? and has anyone experienced similar?