Starting momentum and feeling good then I’m tired

I’m seeing this pattern, I feel confident and unstoppable then all of sudden doubt and tiredness kicks in. And then I just go in circles and go back to educating myself. I need to figure out how to be more consistent instead of being almost manic/depressant in my business. It frustrates me, I’m usually a very positive move forward kind of woman. I always say when life gives me lemons, I’m trying to make lemonade as fast as I can.