I am 32 years old and experiencing spotting 3 days after my period ended. However, it wasn't a normal period. On the 14th, there was light spotting. The 15th was a light flow, 16th was medium, 17th was light, and the 18th was spotting again. Normally, my period lasts for 7 days, and they're always heavy. And I've never had spotting in between cycles. I took a pregnancy test today, and it was negative. Is it possible that I'm pregnant, or is this something I should be worried about?