I need opion i have been cramping really bad and having pains in back.. I have the implant in my arm…

I need opion i have been cramping really bad and having pains in back.. I have the implant in my arm its been two months since i got it... Does it sound like i am fixing to be on my period or what??? This has been going on for three days i need to figure out whats wrong with me cuz i cant sleep or move or do anything.... I am in tears it hurts bad..