What the hell are these symptoms?

Ive been super nauseous. I had a real migraine for the first time. And my body has been getting really sore just from very light activity that didn't used to make me sore. I don't mean like I'm out of shape. I mean it feels like my muscles are throbbing. My breasts are so sore that walking, putting on/taking off my bra, and even laying down is excruciating. I don't have very large breasts either so it's not like they move around a lot lol. They're very tender, as well as my nipples. I've been horrendously moody. Like straight up bitch. And I've been incredibly horny/sexually frustrated. I've never had PMS symptoms like this before. Ever. My period also isnt due for over two weeks. Why could this be happening?