Before AF, what should CM be like?

Millie
I'm 4 days away from Af.. The last 2 weeks I've felt super wet all the time downstairs. When I check my CM it's watery/milky like. I can't think back to what my CM has been like before AF, I'm obsessed with every symptom I get that it could be early pregnancy lol so can anyone tell me what CM should be like before Af?? Any ideas why I'm feeling so wet?? Thanks ladies.