This is my second Mirena. I am 33 yrs old and married. I've noticed. sometimes when I have sex and my husband (Does you know)... I will start my period about 5 days later. Even when it isn't due. At least every other month I've noticed that. I ended my period the New years eve. Had sex on the 5 of January and BUM today on the 11 I stated my period. And yes I have all the symptom's (bloated cramps)... WHY...