I’m so confused

So the past weekend I got 2 positive pregnancy test well I started bleeding on Tuesday and bleeding yesterday and now today it’s like brown old blood so I did go to the doctor and from my app it says 5 weeks pregnant so the doctor said there pregnant test came back negative this was Tuesday then they did blood work and that was negative I said so what happened she said from what I see you was never pregnant what the hell!!!??? Y’all I’m so confused the first test is Sunday morning the second test was Saturday night ?????!!!!