Help OPK !!?

Desire • Hello I’m a mom of a 9 year old, I’m 27 years old. I miscarried at 3 months in 12/2021. Currently pregnant,🧿 Due JANUARY 2022 🧿🙏🏽 GOD is good 💜

My tracking seems off can anyone help me understand?

Why would it look like it’s getting dark 2/4

Than a bit lighter 2/5?

I was also spotting but my period was Jan 23rd help please .