SO CONFUSED

so I found out I was pregnant like two weeks ago today. Line was faint started getting darker got positive digitals etc. got blood work on a Thursday level was 11 so I got repeat blood work the following Monday and my levels only went up to 13. They said chemical pregnancy and do one last round of bloods this Wednesday. I just took a test today and I still have lines they aren’t fading, so I’m not sure how this is a chemical pregnancy or what even is happening. Please can someone tell me what could be going on while I wait for my doctors appt.