not good! that would be very annoying! i have implanon too. only had 2 weeks of spotting and heavy bleed about 3 weeks after i got it put in. every now and then i feel like i am gonna get a period but it hasnt happend again yet. only had it for a few months. i had troubles with the GP placing the implanon in so i still cant feel it under my skin. ultra sound confirmed it but i am dreading when i have to have it out. she said she will have to go digging for it! EEEK!