Positive but spotting...

So something doesn't add up here and I'm hoping you ladies can help me. I had aunt flow visit last week, shorter than normal only 4 days. And then me and my partner baby danced and then a couple days later I've been spotting again. I was reading up about implantation bleeding but it said it only lasts a day or two.... I went ahead and took a test anyway and it came up with this. I'm still having little cramps and spotting so I'm not sure what to think. Did I actually have a period? I don't think it would come up on a test a week after would it? Help me!!