Freaking myself out

So I took a pregnancy test on Wednesday it was clear as day positive. Took it in the afternoon. I had a miscarriage a little over a month ago. So today Friday I took three more. The first one was still positive but lighter then the second one was lighter and the third is even lighter. Still showing up. Its 3 in the afternoon now and I know I should wait til the morning but now I’m tripping myself out wondering why it’s so light the positive line. Is it maybe my pee is really diluted ? I don’t know what to think I have an apt with my doctor Tuesday so of coarse I’m going to sit here freaking out.