Cervical mucus question

Kelsie • Wife, Momma to 3 girls, expecting baby #4! 🤰
Okay so my cervical mucus on cycle day 16 is very watery yet creamy white. Granted, we had sex last night. Could it be some left over semen inside me. It doesn't stretch but it's white and watery. Help! Anyone know what it is. 
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