1 day period (old blood), sign of pregnancy ?

Jasmine • 🇨🇦 🐕 🧪 🌍 🐰

I’ve been having my period for nearly 15 years. Finally the last 2 it has been regular. I got my period as expected, but it was old blood (which usually happens). My period was EXTREMELY light and went away after one day? It’s been 2 days now and no spotting.

Any idea ? Chances of being pregnant ?