Hcg levels help!

I had my first blood test yesterday and it was positive which was so exciting! My

Level was only a 40

And my doctor said it should be a 50

Or 60 at 4 weeks. I go back tomorrow to see if it went up. I’m so nervous. I haven’t read anything online saying that this level is bad but be he made me really nervous. My tests are showing darker every day, I’m

Hoping this means my levels are increasing? I’m 4 weeks 1 day today and I feel like I can’t be happy yet :(