Nausea at 3 weeks???

I had my FET on Monday. Blood test is a week from tomorrow. I'm technically 3 weeks today, and thought morning sickness started at 6. Holy moly! I have been nauseated and dizzy off and on all day. It's not like I'm going to vomit- it's not that bad, but... It's definitely noticeable and kinda awful.
Am I sick or pregnant??