Am I Crazy!? It’s probably all in my head...

We are trying for #2. I am 6DPO. Yesterday had a headache, fatigue, slight nausea, and just felt blah. Had a slight temp dip this morning, and major nausea all day. I work with my mom and she came back from lunch with a sandwich that had red onions on it. I love red onions. But I could smell them as soon as she walked in the door. It was in a bag rolled up. Made me want to puke. Tested the theory. Went to subway and got my fav sub with red onions. Couldn’t eat the onions.

Isn’t this too early!? What is the EARLIEST you felt symptoms?