Lighter then dark again BFP 17 dpo - 22 dpo?!

So confused. Has anyone experienced this before? I had a chemical pregnancy last cycle so I’ve been on edge, to say the least, with this pregnancy. I’m 5 wks 1 day. My chemical happened around the same time last cycle, and it started with test lines not progressing then getting fainter. I was certain this was happening again since 19dpo seemed less dark than 17 dpo , and then on 20 dpo it was definitely fainter, and fainter than the control. Also loss of pregnancy symptoms. Called my doc, they had me in for blood work yesterday, and waiting results. I had an extra test so I took one this morning, and it showed another blazing positive (21 dpo). On 19 dpo I tried diluting to test the “hook effect” theory but it didn’t change (that test not shown on the pic). I know I’ll hear from the doc today, but should I still keep my fingers crossed? Also regardless of outcome, I’m not testing anymore because this has been too stressful!