CM question

Kathleen
Ok so I have a weird question. I check my CM every morning and recently its been eggehite so I'm assuming I'm fertile. But hubby and I have been BD every night so I'm wondering if what I'm thinking is eggehite CM is actually just residual sperm from BD the night before? I'm curious because when I check my CM later in the day it isn't as much as there is in the morning. Anyone have any insight??