Please tell me, we've been going on for a year and two months, and our…

Please tell me, we've been going on for a year and two months, and our daughter has started having tantrums that even drop her back and hits her head specifically. She doesn't want to hear or see anything. Is this considered normal at this age? I don't know how to talk to her anymore. It won't detach from my breasts. I'm writing it all off to teeth?