@Regenbogen22 hey lovely, I'm so so sorry for your losses. Let me quickly tell you my story and I hope it brings you some comfort, as I have spent the last month obsessing and googling and found no comfort!
I have had previous losses so I am already on edge this pregnancy!
So I know when I ovulated, so am sure of my dates, at 5 weeks I started with some spotting, some pink, but mostly brown, I went for a early scan at what I know was 6+2, they couldn't find baby, only a sac and dated me at 5+4.... this sent me into total panic as thats when I started bleeding, they ran bloods to try and bring me some comfort, however it did the opposite l!!! My bloods went from 22,100 to 23,443 in 48 hours! I was absolutely convinced I had had a MMC, the doctors were telling me it wasn't looking good, everything I read pointed to MMC, so I had another scan after an agonising week, at what would be 8 weeks..... and there was baby! Measuring bang on with a little heartbeat! I was absolutely certain I was going to have lost it.... I asked about the bloods they said any scan trumps any blood hcg, as it can vary so so much!
Also just to add on the pregnancy test thing, my lines were dark really dark, dye stealers! But then after I started spotting I tested again and the line was much much lighter! Again went down the Google rabbit hole, and read about the hook effect! The hook effect is where your hormones get to high basically and flood the test, so I added half water to the urine sample and tested again! And low and behold the darkest result I've ever had came back!
My advice would be book an early scan! They aren't too expensive and the relief it can bring you if worth it!
Sorry for the long post but I hope you find some comfort.... all I looked for was some answers this past month xxxx