After my last menstrual I spotted red two days afterwards. Then a week later spotted (brown) for 12 days until my period which was different it only lasted two days and was medium to light. I took a pregnancy test on the 3rd day of spotting and it was negative. Should I be concerned? I am worried because I never spot.
The flu or any other illness can change them as well.
Since the hpt came back negative you could try another one a week later to be sure.
I'm sure it's nothing to be worried about, but if you develop more symptoms, and you had unprotected intercourse, you may want to see a doctor to rule out an STD.