Should I be worried ??

I’m currently on cycle day 40, about 14-15 DPO I got my first positive on day 38 (top picture) yesterday and today are bottom two. Should I be worried that the lines aren’t getting much darker yet? This is my second pregnancy and I can’t remember how quickly they got darker last time. I took a blue dye test and a digital on the afternoon of the first positive and they were both very clearly positive. I’m scared to death of this being a chemical pregnancy