What might cause such bad stomach cramps and pains that it makes you cry and black out?
I'm afraid there's no way we could know that. You would need a physical exam and possibly some tests to find out what is causing your pain. If you're having pain that severe, you really do need to see a doctor as soon as possible.
Some people do suffer from esophageal spasms that can cause intense pain that sounds like what you're describing, but again, you'll need to talk to your doctor about it as soon as possible.
Here are some links that might be useful:
Using Tylenol Responsibly
Let’s Talk Pain Meds
What You Didn’t Know About Pain Meds