What the hell... HELP

So yesterday morning, I woke up with bleeding when I’m not supposed to get AF till Sunday (the 17th). So I figured omg implantation bleeding! Day goes on and I have pretty intense cramping and I’m bleeding pretty heavily and then the bleeding all by stops by the end of the day. I’ve been thirsty like you would not believe, like cotton mouth. No amount of water is enough. My boobs are huge, my nipples are acting all weird and yesterday I was bloated. Today I wake up and I’m still bleeding, not as heavy as yesterday but still bleeding. Im not sure if this is super early signs of pregnancy or if it’s my period but why would I get my period a week early?!? Anyone else have this happen to them?