I’m bleeding again a week after my period?

So my period ended last week on the 13th, and i started to bleed after my workout last night around 11pm, just a little bit. It stopped this morning and I’ve been okay all day (i know it’s weird) as I’m at work right now, I’m bleeding lightly again!!! It’s not like my usual period.... I’m super heavy on the first 2 days so this is super weird.

I am not sexually active and no there isn’t any pain. Oh i haven’t been irregular since i was 13!

Any advice?