OPK confusion : (

[True Blue]

The choice you have to make is whether you want to have more chance of pink or more chance of conception
If pink stick with the 4 day if you just want to conceive you can add an attempt now. More attempts will bring you into Blue frequency.

[atomic sagebrush]

CD1 is the first day of full flow requiring a pad or tampon so you are probably more like CD17

yes agree 110%

[atomic sagebrush]

If you really can't decide, flip a coin. Don't sit around debating or writing big pro-con lists, just take a minute, turn it over to the higher power of your choice or Lady Luck, flip a coin, and do what the coin tells you.