So, I'm only CD9 but have started OPKs CD7 because it's my first cycle and I want a good baseline. The issue is I drink a lot of water, to the point where my pee is clear all day. All of my OPKs so far are barely there faint, which I understand I'm early so I'm not expecting a surge yet. My question is would it be appropriate 5o take an OPK with fmu? I'm unsure if it will give me a false positive, but I also worry about false negatives in the afternoon due to how much water I drink.