Odd Post-menstruation stuff

So, I started my period last Sunday. It was pretty normal until Thursday when it abruptly stopped. Not totally unusual. Then went through the weekend with zero signs of menstruation. Then Tuesday this week I started having dark brown mucus-like discharge. It’s enough that I’ve had to use panty-liners. As embarrassing as this to ask — I’m not sure if I should see my doc, buy a douche (kinda lol Bc I’ve NEVER had to do that!?), or what?! Advice please?