I need help.

Bay • [[Phlebotomist❤️]] | [[Night shift worker]] | [[Praying for a blessing❤️]]
I just started tracking my bbt. I have only been tracking for 5 days. Is it supposed to spike like this? I have been taking it at the same time every day. I have also been using opks. My opks have never been as dark as the control line.. but do get darker and then a day or so of being dark, it goes light again. I'm so confused. :( please help.