I have been taking pregnacare conception tablets for the last 18 days. My cycles are like clock work and come every 28 days, however i started bleeding at CD 26. The symptoms: strong abdominal cramps like period pain, flow is not as heavy, brownish red lumps / clots, dizzyness, headaches and occasionaly nauseas. Could this be implantation bleeding or a normal cycle? If its a normal cycle, why is it early and could it be that the Pregnacare Conception tablets has affected my cycle? I have never had this before. Should i be worried? Or seek medical attention?