I have had my impanon for 5 years. (No insurance) I am 26, 5 2, small build, and good health. Until now...I have been on my menstrual cycle for almost a month, serious cramping, and the moodiness or pms is overbearing my normal positive nature. Have taken 4 test- all negitive... I will have it out soon but please explain the risks and causes of discomfort I have just inflicted onto my body. Please! Thank you for your time, Jessica.