Confused. Period or not?

Dani

So my fiancé and I are ttc. I went through from my last period until now when my period was supposed to start yesterday. I have normal cycles. I’ve taken about 4 tests from 5dpo until about 9 or 10 dpo and they were all negative. Throughout the whole tww, I’ve been nauseous, sore boobs, tired during the day and can’t sleep at night. A little crampy and back pain. So since I got the negative tests, I’ve expected AF to come on the 19th. I spotted yesterday with a light pink color. Then when I woke up this morning, I went to the bathroom and there was about 2 drops of brown blood. Any idea what this could be? I’m confused because this never happened before. And I just ruled it out that I wasn’t pregnant because of all the neg tests and spotting yesterday. 😔😔