I have been having very regular irregular periods (if that makes sense) I have a period every two weeks. They are generally the same consistency and usually pretty heavy with lots of cramps. This time around I am experiencing some early pregnancy symptoms and my boyfriend is worried. I don t feel like there could be anything wrong because I don t feel like I even have enough time in between periods to get pregnant. He did start me thinking though and watching my period which is only visible when I wipe and is a dark dark red and clumpy and when it does show up on my liner is a light yellowish brown. I am on Implanon for birth control and we do not use condoms. Any insights on why periods behave the way they do, and the sudden change?