My husband and I have been trying to conceive for a couple of years since our son turned 2. We've not had any luck but last month, I was over a week late, my breasts were very tender, I was having mood swings and could have sworn I was pregnant but wasn't. I ended up starting my period, very heavy flow. This month, I'm having the same symptoms and I'm almost a week late again. I have not been on any birth control in two years and my periods are like clockwork, give or take a day or two. Why all of a sudden are my periods late and my hormones giving me mixed signals of pregnancy?