My tomatoes are starting to crack. If it doesn't rain (I live in the deep south -so it's usually in the high 90's this time of year), I water daily, and fertilize with miracle grow twice a week. I've had a few that are getting blossom end rot, and so I'm researching that on here, but I can have a great tomato and the stupid thing will have a crack in it.

You cannot use Miracle Grow that often! You only use it once at the start of the growing of the green tomato. You are worse than overdoing it. You will never have any tomatoes to eat at the rate you are going now. Just water and stop fertilizing and Miracle Growing your tomatoes. Maybe you might have some edible ones in a few weeks. FYI That's what is causing the blossom rot as well.

I still eat the cracked ones and if half is no good, I eat the other half. :D

Cracks in tomatoes usually indicates too-wet-then-too-dry situations. Watering every day is too much for established plants. Much around them with newspaper or straw or something to keep the soil from drying out between watering once or twice a week.

I also have another thought about your tomatoes. The fact you are in the deep south and it gets into the 90's it may be literally too hot for you to properly grow anything. When I lived in South Florida (cant get any more south than that) I would grow in the spring and fall and totally skip the hot summer months altogether.