So my hubby and I haven't been trying very hard but we never use protection, either.  We had sex on July 28, a week before I was supposed to start my period. My August period never showed.  I tested 6 times, every 3-5 days, and always got a negative.  No faint lines, nothing.  Then, when my Sept time came around, I started bleeding right on time. The only problem is....it hasn't stopped!!  I've been on my period for 15 days now and I'm starting to freak out just a little bit.  I've heard periods can be heavier if you skip one but this has actually been lighter on average than my normal gushing cycles, but longer. I've never gone longer than 6 days before.  I have also been passing a lot more small clots than usual.