Highly Confused!

Ka

Idk if im going crazy or my body is. AF was supposed to come on 3/17. She came a day early on 3/16 with a vengeance. And today ive barely did anything. Now i have heard of 'implementation bleeding', but I had hell for a day and a half. The biggest confusion I have is that ive had morning sickness, boobs sore, and ive smelled multiple differ things & almost vomited from it. Ive tried to eat something because it sounded good and couldn't finish eating it. I took a test the day before AF came and it was negative. Someone please offer me some kind of advise!