Do you still experience the same amount of stress?

If so, speak to your investors.

I wouldn’t frame it as you’re close to an heart attack. Say the workload you have hurts the company and that you need to hire someone who can deal with all those admin / operational things to run the company, so you can focus more on the product and accelerate growth.

Alternatively if you can cash out then consider that, if you think your health will deteriorate further and cause early death or make you partially paralysed (stroke).

Selling your house and car and moving your family to a more dangerous part of town is quite the gamble.

Take care of yourself and hope the gamble pays off.