Food aversion?

When did your food aversions start?? Was it before your bfp? I used to love the Ramen noodles in the cup. Then this morning, I grabbed one, opened it up, added the water and waited the time limit. When I took the lid off to eat it I literally started gagging. So I drained most of the water thinking that had something to do with it, I was wrong..still though I attempted to eat a bite and ended up throwing it away...what is going on?? Period is due the 29th.