Tonight I Ate Take Out Food Which Was In An

Tonight I ate Take out food which was in an aluminum dish but covered with clear firm plastic cover. I kept it in a 200 degree Fahrenheit oven to keep warm for about an hour. When I took it out, the clear plastic cover had shrunk to a hard glib of plastic. I removed it, thinking I had gotten rid of it. I ate half of it, but then became worried that I had ingested some that perhaps had liquefied. It tasted almost normal, but a little odd. I should not have eaten it. How dangerous was this? It has been about 5 hrs since ingesting.
Please advise.
Thank you so much.