i think it's rallybbek with the implanon. your insertion site will probably hurt for a week. if it hurts longer than that get it checked. i would advise keeping a diary. if you start feeling psychotic, weepy or anything else, keep a note of it (don't put it down to the baby or anything).

with implanon i had the following:

1) random spotting
2) weight gain
3) acne
4) cry at the drop of a hat
5) destructive (relationship etc)

it's different for everyone, and i also believe hormonal contraceptives are better handled in your early 20s than any other time. i was about 26 and starting on that hormonal aaargh phase.

catherine - there is a strong link between sleep and PND also - you sound like you're coping really well so i would doubt you're likely to slip into PND any time soon. i had PTSD myself for most of my teenage years and early 20s. (was in denial too). i had pretty carp blues after milk came in for a few days but only find myself going stupid when i'm exhausted. generally i feel like i'll make it.

kim - do you find it hard to sleep generally? are you sleeping at all when you're not eating?