Is this normal?

First time really taking opks but wanted to start tracking because I’m taking progesterone cyclically. Is it normal for them to be this dark on cd 3/4? I know they’re not positive but they seem a bit dark for that early in cycle. I only had a light like 2 day period so starting taking them after bleeding stopped. Should I wait a few days before using them again or keep testing? Top is from yesterday middle is this morning and bottom is this evening