The whole garden is dying
I have a smaller garden. One day it looked awesome! Within 2 days my bell pepper plants are wilted and have black purple color on the peppers, the tomato plants are wilted and almost dead, and the pumpkin plants have yellow spots on the leaves and are dying. I don't know what is happening to my garden. This is the first time I have had a garden and I was really excited to have fresh home-grown veggies but it all looks really bad...even the corn stocks are starting to look bad. What do I do?
It's very distressing, I know. There are a number or things that can go wrong with veggies, and now you need to become a detective, look closely at stems and leaves, and poke around in the soil. These articles will give you descriptions of the most common diseases: https://www.gardeningknowhow.com/edible/vegetables/pepper/common-pepper-plant-problems.htm
It sounds like you could really use the assistance of the County Extension Service. They are supported by your tax dollars, and are there to help you. This site will help you find the nearest one: