Help Identifying Disease/Problem

[grennans]

Hello!
I'm new to Tomatoville and searching for answers to my tomato problem here in Missouri. My plants were all thriving and ready to ripen fruit. One plant had brown, curled leaves which I removed. But over the weekend and this week it has taken a bad turn and is quickly going downhill. Closer examination finds disease spreading quickly to other plants and not just curled leavs, now also spotting. I've attached several photos.

I've never been very good at looking at sample photos and reading about characteristics of various diseases to determine if that's what mine have; I seem to be able to find similarities with ALL the diseases! So, I just wing and am only sometimes successful. I don't want too lose all my plants. (

Don't know what to do...Please help if you can! Appreciate any words of wisdom.

Grennan