Nexplanon Implant

I'm wondering what experiences anyone has had with the implant? I got mine recently and have been having a rough go of it. I have a hormone imbalance so i'm nutty most of the time, but i've been very sad recently. I'm also overwhelming stressed about weight gain as it has been a struggle for me and I recently lost 20lbs! Ive also been bleeding for which seems like endlessly... Help!