Apply for disability. Make sure that you mention the factors you mentioned here on your application. When you answer the questions on the application, pay attention to the overall impression you are providing. For example, if they ask if you can do X, and you can but it makes you sick for 2 weeks afterwards, make sure you mention the hardship involved.

From what you said, I think there's a chance you will qualify. Also be ready to explain your ailments and symptoms to doctors in a way that gives an overall correct impression and is concise enough for them to listen.

If you have trouble with filling out the application for any reason, including psychological ones, consider trying to find a friend or someone from a community center or church to offer support.

Good luck!