[anonyacc]

My situation is not as extreme as yours, but I was diagnosed with IBS and second this advice. That said, you should also cut chocolate, alcohol, carbonated or acidic beverages and anything with caffeine in it. Reduce your diet to fruit and vegetables for a few days and drink mostly water (room temperature). Then experiment by adding in other foods over time.

You may already have done this. But if you haven't you need to. Because if something in your diet is exacerbating your digestive problems, you will start feeling better faster by cutting all suspect foods than by randomly eliminating them one-by-one. Also, you may find your system better able to handle certain foods when it isn't under stress from digesting others. Some things that cause problems for you when you're sick might be perfectly OK in moderation when you're feeling healthy.

As far as business goes, I run my own startup (bootstrapped) and it is really hard and stressful. I'd suggest keeping your job with health insurance and trying to fix your lifestyle/diet before taking on any extra stress. It may be a cliche, but slow and steady really does win the race.