Spotting

I an spotting and it's not line a period but more of a couple drops when I go to the bathroom. It went from red to dark brown to mixed and now it's red again. I know it's totally normal to bleed. But my question is how long should you spot ? I've been spotting for about 24 hours. I went to the er and they did exams so stuck a few items up there and my mom said that could be the reason why I'm still bleeding. But I'm just curious as to what you ladies have to say