26 day cycle help??

Kimberley
Hi, I have a regular 26 day cycle.. I've been feeling kinda off this month and was wondering if anyone can help? 
Cd9 unprotected sex 
Cd10 unprotected sex 
Cd 11 a lot of nausea 
Cd12 a lot of white wet cm 
Anybody got any insight? 
Baby dust to all 😊