Short late period with spotting days apart

Janelee

I’m so confused I don’t know what’s going on. My last period started 12/30. I was getting worried about being pregnant since normally my period comes on time but my period started 2/7 which started dark brown and i only bled for a day and a half. I took two pregnancy tests and both were negative. A week later 2/11 i bled in my underwear and the color is dark brown still. Could I be pregnant?