CM question during fertile week

I'm starting to worry this month. Usually I get a + opk on cd 15/16 every month and also have obvious change in CM from watery to egg white. This cycle I have yet to get a + opk and only had a small amount of watery cm today. I am cd 16 currently. I will keep testing but curious if this will affect my chances of getting pregnant this month? Or maybe I could ovulate later? But I swear my cycles are always the same. Any advice or reassurance welcome. Thanks!!