@Hope1986 I'm so sorry you're going through this. Can't really offer any advice on the hcg angle, but just to say that the waiting game is crap, and to a certain extent we just have to endure it 😔 It's definitely the worst bit. And of course so much worse a wait if you've had previous experience of loss.
But I wonder - and I mean this with a lot of love - if you might make yourself even more anxious with repeated testing? Hard as it is, it might be best to try to just take every day at a time - and, as long as you have no severe cramps or bleeding, just hope that this means all is going as it should?
Regarding ClearBlue, I was still at 2-3 weeks at your point (5+2, right?). It only went up to 3 when I was 5+6. Because remember that to get your 'real' pregnancy age (which ClearBlue measures), you have to subtract 2 weeks from your gestational age. So don't see the ClearBlue reading as anything to worry about right now. I was exactly the same as you and had virtually no symptoms at that point.
I have no idea if any of this is helpful, but please try not to worry. On the other hand, absolutely feel free to vent here and we'll do what we can to reassure you (as @T0r11210 and @Lemonbalm8 have already been doing 🤗) x