Jen -- what you're going through is completely normal. Seriously. In my previous life I invested in small start-up companies and it takes a while to get profitable. I think the key is stay really focused on your expenses and to make sure that you're spending money on doing things that bring in business at a good return on investment and that you have, in your mind, a steady-state business model that is profitable.
So for example, I think if you're going to spend $100 bringing in 10 customers, then your goal has to be that they each spend at least $10 -- which would mean that you break even -- or hopefully more -- which would mean that you're profitable.
But even with metrics like that, it's tough at the beginning -- every business requires upfront investment. And I can totally relate at how stressful that is -- you're investing with the goal of making money later, but until you get there, it's very uncertain.