I'm wondering if this injection is the reason to some symptoms I've had on and off since having this injection about 8 years ago... things that are weird, fuzzy head, nerve things, anxiety - I can't remember the exact time line ... but after a few months of having the injection this time the symptoms have come back ... I'm wondering if it's causing some weird build up of hormones making symptoms or what the hell it is - I've switched to the mini pill now ... but is that the same hormones?