Bleeding but tests are getting darker

I took a test on Saturday

I had a faint positive but by Sunday I started spotting and by nighttime it was bright red. Now it’s Monday still bleeding I don’t know why but I decided to take my last test and it’s darker ?

Has anyone had this happen ?? Is it darker because I’m bleeding or could I still be pregnant I thought I was having a miscarriage but I would think the tests would be lighter not darker

And now I’m able to actually get a positive on a digital ?!