Why am still doing this!?!

Why do I even test I know it's never going to be positive. I feel like yuck today. My back has been bothering this whole weekend and I have killer headache and am some what queasy. My period is due the 8 so I took a test and of course it's negative. I feel like quiting but at the same time I can't let my slef do that I want baby number 2. I am so tired of this rollercoaster ride.