One day period or pregnant?

Heather

So, my period is regular and comes every 28-29 days. Last month it came on CD 23..but.. I only bled for a day. I decided to just wait it out and see what happens this month. Well, AF was due yesterday. I bled. Just for a day though because I've had a couple drops this morning and that was it. I'm going to pick up a test just to see but wanted y'all's thoughts on it too. Period normally lasts 2-3 full days. So this is super weird..