It will be okay. It's better you got out of that hostile environment and it's better you didn't try to force yourself to do a job you can't handle. Life is hard enough as it is without all the added drama and stress.

Don't worry, it will be okay. There are other jobs. Now you've learned some things form experience, which is good. You know yourself and what you can handle, which is good. Now, when you interview for jobs you can ask questions about pacing, etc. Remember that you're interviewing them as much as they are interviewing you. You'll get another job. I'm sure of it!