What advice would you give to someone feeling discouraged or doubtful about their entrepreneurial journey?

I found that goal setting and breaking down those goals into individual tasks made it easier to see the path to growth. If 5 big goals for the year have 10 tasks each to achieve them, that's enough for 1 task each week for the year. If you do all that work and still fail, you can honestly say that you did at least 50 things to make it work. That at least helps to address the operational needs of the company. 

In terms of your personal feelings as an entrepreneur, just know that you aren't alone. Everyone who has built a business from scratch have these problems. I'll bet cash is uncomfortably tight? You have a couple clients who are unreasonable but you can't afford to fire them? Your staff aren't nailing it? How about not having enough hours in the day? Beeeeeen there. We all have.

The burnout, the anxiety and the uncertainty will clear up if you're willing to keep pushing forward. That struggle you're going through today is extremely important, necessary even. When you overcome today's big nightmare, (and you will one way or another) you'll come out of it more trained and skillful for nightmares like that. Knock out enough nightmares and guess what, nothing is a nightmare anymore. You'll be less and less vulnerable, or maybe just vulnerable to tackle bigger and scarier issues. There's no pathway to entreprenuerial success that isn't paved with the hard won experience. 

Somewhere along the way, a friend or family member will point out how you kept your cool in a seriously tough situation, and you'll realize that it wasn't tough this time, and you'll remember when it was the toughest thing you could imagine. Riding out entrepreneurship will change who you are.