Period? Again?

This is really weird but I got my period twice this month? I started on the 9th and it ended within five days which is abnormal for me. It’s usually 7 days. But then today I started up again. I first I though it was something to do w ovulation bc I just finished up but no I think this is my actual period again. I’m really confused because this has never happened before, and I’m supposedly due in 12 days. I’ve had my period for 6 years and they have never been like this. Is there a possible explanation for this? Should I just wait to see if there’s even more blood tmrw morning?