Nexplanon

I’ve had nexplanon for about 8 months about a week ago my boobs ... almost feels like my muscles/chest was super sore I have sharp pains in my boobs and sometimes throbbing.. sometimes moves under my armpits comes and goes from morning to bed... I could just be sitting down relaxing and they start hurting don’t have to squeeze on them. like my boobs hurt so bad I’ve never experienced this . I’ve felt for knots and lumps nothing. No skin discolor my boobs look normal just hurt super bad... Is this normal for the birth control to cause this? Or something more serious has anyone else experienced this? I may have it removed...