Quoting Emma Jo's Momma :" I don't want this to last 3 weeks! These cramps are killer! I get Implanon put in on Friday. I wonder ... [snip!] ... period. And having a period now after not having one so long is WEIRD! haha. It's like I'd forgotten they existed. "
Yea I know what you mean! lol I'm kind of dreading my period for the same reason.
I read that Implanon does mess with your period. That if you usually have a heavy flow it'll make it heavier but, I don't know about length. I would think it affects that too.