I was anemic in both pregnancies - severely to the point of almost getting transfusions. I got Nexplanon - had it a year and had no periods and now I've had 4 periods, 7 or more days heavy bleeding in less then 2 months and I'm worried. Clots have also been happening a few times. What is going on? I'm lightheaded, tired, and I'm in a lot of pain at times.