Help, OPKs look like it's getting lighter. Is it because I used a different brand this morning?

Just started on the 25th which was day 8 of cycle @kita_shortie

how long have you been tracking for this month

i see that the first 4 test are very dark and the last 1 is light dont matter of the test it should still be dark

That's what I was afraid of @kita_shortie

it also can be that your fertile days are going away @hopebby,