Apparently you can't post pics when creating a new post on your phone.

Above is the plant in general, leafs and stems. Below is a picture of some green pods.

The last picture, my favorite, is the final result, a perfectly ripe whatever it is.

I think it's a hot pepper but I know I didn't plant anything like this.

It is a pepper and it's likely hot. Sweet peppers are an exception among the MANY varieties of pepper...just one end of the scale. Everything else is between sweet and Habanero. Likely grew from seed found in your compost or a fruit left last year by a squirrel, etc.