Confused if I’m pregnant even with a positive test.

So Friday I took a test and it came out positive. Two lines! Well I took a digital to make sure on Sunday and it said not pregnant. But I barley peed so I feel like that is why? But now I’m bleeding or have brown discharge. I used a tampon bc I wasn’t sure. After a little bit I took it out and this is what it looks like? Had it in maybe three hours. Is this normal. This would be my third pregnancy. I will be taking more tests tomorrow. Please help! Ugh