Should I be concerned?

Alex

I’m calling doctor today to let her know I got a positive test! I posted my tests below. Should I be concerned that yesterday PM is darker than this AM? I think it takes 48 hours for HCG to double and this AM is definitely darker than the morning. Just any experiences? We have been trying for a long time and this will be our first. So I’m so excited but obviously anxious and worried! Thank you in advance! 💕