Finally bought one

Khadejah
So today makes the 7th day that I'm late. Im usually regular but if i am late, its only like a day or so. Aside from my jeans feeling unusually tight across my stomach, i feel fine. I bought a hpt on my way to work and now that im at my desk, i feel like its burning a hole in my purse. Do I really need to wait til the first pee to take it?