Anyone else have this happen?

I had a period. Feb 14-22 which is way longer then normal. I took a pregnancy test after due to having weird symptoms. It was a faint line. Then yesterday took another one and it was way darker. Def not missing the line. So I called the ob they sent me for blood. They called me today and the blood came back neg. but the test this morning came back darker then yesterday morning. So now I’m like what’s wrong with me. Or going on. The nurse said she will have the dr call me Monday to discuss what he wants to do further to figure this out.

In person it’s way darker. Has anyone had this happen? If so what was the outcome?