Aversion to a food I used to like...!!

Sarah
I'm 4 weeks 6 days. I LOVE broccoli raw or sautéed and ate it just last night. I made some for lunch and could not stomach it at all!!! Has anyone else had such a quick change in what they can or cannot tolerate? This is the first day of my pregnancy that I have experienced this! Wild! 
What was the first food that you couldn't stomach?