Why do I have an aversion to leftover food?

Okay. So I’m pregnant. That’s probably a good reason why I’m having food aversions in the first place. But this particular aversion is really strange.

I’m not talking about eating leftovers from a few days ago. I will eat something for dinner and be fine. Then I’ll eat it for breakfast and puke all day. It’s the same whether the meal is made at home or ordered from a restaurant.

All kinds of food that I don’t normally have an averson to.
American, Italian, Mexican, Asian, Mediterranean…
Meat, poultry, vegetables, fruit, dairy, grains…
Spicy, bland…all of it. Barf.

It’s not morning sickness. I’m in my second trimester.
I make sure to reheat everything thoroughly.
On the stovetop and in the microwave.

Does food break down that much over a few hours?
What exactly does my body think is a threat?
(Assuming that is the root of why pregnant women have food aversions.)

Has anyone else had this problem?
If so, how did you deal with it?