How do I keep my energy up and stay optimistic when I don’t see results?

I’m in the second week of launching my program, my goal was 50 people and so far only one has enrolled. I have a couple of verbal yes’s but no more money in the bank. I have 3 days left to promote. I’m proud because I’ve done everything I committed to doing and more. I’ve stayed optimistic. But, today I realized that it’s probably that I won’t hit my goal, that in fact I won’t even get to 10 and I’m starting to feel scared, sad, disappointed. I know how important it is to stay optimistic all the time, but how can I do it when I’m not seeing the results?