May not be the advice you want to hear, but... you sound like you're in a country with a pretty terrible healthcare system (US? India? Ah, Brazil according to your bio on your site). The first thing I'd do in your position is move to a country with a proper public health care system - probably the UK.

Do it via finding a job or any other method, but somehow do it. The startup itself doesn't matter. You write "I have a great responsability" - yes, you do, you have a great responsibility to yourself to take care of your health. In terms of order of magnitude, the responsibility to the startup is a 1000x less. Fuck the startup, health comes first. And if fixing your health requires moving to a different country and canning the startup, do it.

Thats perhaps the most important thing you should take away from this: your priorities are all screwed up. Health first, startup a very distant second.