7dpo?

I'm really unsure how to feel. For the past week I have been very nauseous and getting some poke cramps. My period doesn't start until 1/20. Well usually. But I'm just concerned about this feeling. I mean when I'm gonna start my period I get a feeling like this a couple days before. But now it's just random sharp pain in boobs. Cramps randomly and wanted to throw up. I'm so confused.