"i have had implanon for 3 weeks. i had been on nuvaring for 2 years before getting implanon. insertion was definitely scary because i am scared of needles. my arm had a big bruise for about a week and my arm was sore for about 2 weeks. it almost felt like i had pulled a muscle. i have had a really light period similar to my normal period since getting implanon. i would suggest to anyone who is interested talk to your doctor and determine if it is right for you. "