No knowing the first thing about your product or market, I'll still go out on a limb and propose that you're most likely wrong. If I had a nickel for every time I thought something was absolutely key, and it turned out to be a wrong assumption - well, I could probably buy a Starbucks latte.
Hey, by all means, work hard, push forward and do awesome stuff and win, I'm all for that - but don't lie to yourself, especially not if it's impacting your health and your family.