Where can I buy a good winter coat??

It’s starting to get cold and I need to buy a new coat ASAP. My old one doesn’t fit anymore, but I don’t know where to go buy a new one. I gained a lot of weight this year so this is my first time being plus size and I’m still getting used to shopping for my size. Where can I get a good WARM coat, preferably for a reasonable price? Ladies help out 😫😫 I’m so cold lmaoooo

I’m a 0x if that helps ! And I live in Chicago so I can’t wear any little windbreakers or anything I’m talking SERIOUS cold