Tests

Did anyone have negative tests before they got their positive?

I have been nauseous, boobs have felt big, my smell has been heightened, and my acid reflux has been horrible all week. I’ve taken two tests (Tuesday and an hour ago) and both of them were negative. My period is supposed to start on Monday according my tracker apps, so I might be testing too early, but I also know that I might also not be pregnant. I just really feel like I might be pregnant because I haven’t felt like this since I found I was pregnant last time