?? Confused!!

Emm

I’m not really sure how this works but I am 17, and I have Implanon, which has caused me to not have periods, I haven’t had a period for the 9 months that I’ve had it. Lately I have barely been eating, I’m not really sure as to why.. but I’m never hungry. However I have MASSIVE cravings. Let’s say I’m craving pizza, I will buy a pizza then I look at it and it just doesn’t look appealing whatsoever and honestly makes me sick. I’m not sure what any of this could mean because I’ve heard being pregnant makes you hungry but I don’t know if it’s different for other people. Also my boobs have been very sore lately as well as my back. I feel like my back is more of a muscle problem from working with my horses but I’m not entirely sure. Thanks.