Are you looking at your 'month to date' income statement?
Depending on what day of the month you are in, you will show different net incomes due to payroll and other expenses happening at different days of the month.
You could show a profit on the 14th, but when you login on the 16th after payroll is run, you could be running at a net loss.
Since there is not Statement of Cash Flows, it might be a little difficult to understand where your cash is going.