Test progression encouragement please

Hi everyone,

This is my first cycle trying (and first cycle) after a 20 week loss at the beginning of April. My husband and I did not expect to conceive so quickly, but I tested for the first time at 12 Dpo two days ago and got a positive. I’m now freaking out that today’s test (14 dpo) is not as dark as it should be/not darker than yesterday. I know hcg doubles every 48 hours so I’m trying to comfort myself with that but I’m so scared this is going to be another loss, I just need encouragement from people who know the anxiety. I’ll put the pictures in the comments if I can, TIA ❤️‍🩹