I've had my implanon for 3 yrs , and Iam heavyweight, 5'3 180lbs ... And it expired August 15 this year and I had unprotected sex the 21st , and now this week I've been feeling crazy, don't feel like eating , tired , cramps , and uti, last time I had a uti was with my previous child, how long before the implanon actually runs out of your body completely?