Would you eat this?

I’m 99.9% sure I’m not going to risk it, but wanted opinions. My husband put my left over pizza in the oven inside the takeaway box (no idea why he thought this was a good place to put it). He’s then forgotten about it and preheated the oven for dinner tonight with it inside. I came home and thought something was on fire, it smelled so bad. Luckily it wasn’t and the pizza looks absolutely fine but I’m guessing it’s not okay to eat? Worried about chemicals from the pizza box, plus I’m pregnant. Thoughts?